EP0856126B1 - Verfahren zur Erzeugung von Sperrdampf für eine Dampfturbine, sowie entsprechende Dampfkraftanlage - Google Patents
Verfahren zur Erzeugung von Sperrdampf für eine Dampfturbine, sowie entsprechende Dampfkraftanlage Download PDFInfo
- Publication number
- EP0856126B1 EP0856126B1 EP96945485A EP96945485A EP0856126B1 EP 0856126 B1 EP0856126 B1 EP 0856126B1 EP 96945485 A EP96945485 A EP 96945485A EP 96945485 A EP96945485 A EP 96945485A EP 0856126 B1 EP0856126 B1 EP 0856126B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- turbine
- drum
- saturated
- sealing
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 2
- 210000004907 gland Anatomy 0.000 title 1
- 229920006395 saturated elastomer Polymers 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000013021 overheating Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/002—Steam conversion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/007—Preventing corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/005—Steam superheating characterised by heating method the heat being supplied by steam
Definitions
- the invention relates to a method for producing Sperrdamf steam power plant with a from saturated steam. It continues to focus on one Device for performing this method and use of the barrier steam generated by this method.
- saturated steam When water evaporates, it evaporates by adding heat this in whole or in part.
- the resulting one Steam is in the thermal with the remaining water Equilibrium and is usually referred to as saturated steam.
- saturated steam may contain considerable amounts Water components, so that machine parts exposed to saturated steam Damage, for example in the form of corrosion can.
- thermodynamic Reason is when using steam as process steam in the chemical industry or as a working medium in one Steam power plant requires overheating of saturated steam.
- the saturated steam is usually first of all Water separated before further heat is supplied to it.
- a steam power plant working according to the natural circulation principle is usually one arranged in a steam generator Evaporator both on the water and steam side with one Steam drum connected.
- the water-steam mixture generated in the evaporator is fed to the steam drum, which too serves to separate water and steam.
- From the steam drum the water is again fed to the evaporator, so that there is complete circulation.
- the steam In the steam drum the steam is in equilibrium with the water and lies thus as saturated steam.
- To branch off through evaporation Saturated steam obtained as useful steam is on the steam drum a useful steam outlet arranged.
- the steam is usually the useful steam of a superheater heating surface fed and overheated there. The one that overheated Steam is then fed to the steam turbine where it is relaxed working.
- the invention is therefore based on the object of a method and a device for generating barrier steam specify, providing superheated Steam is guaranteed particularly reliably with simple means should be.
- the invention is based on the consideration that the needed as sealing steam when starting a steam turbine superheated steam is at a lower pressure level can than the available saturated steam. So is one Relaxation of a first partial flow to be used of saturated steam possible. With this throttling of the first Partial current lowers its temperature level. The thus resulting temperature difference between the unthrottled Saturated steam and the throttled first partial flow The saturated steam can therefore cause the first partial flow to overheat be used.
- the superheated steam generated in terms of its mass flow and its pressure level particularly flexible to the The first partial flow will be able to adapt process requirements advantageously via a controllable throttle valve guided.
- the relaxed and overheated first partial stream fed to a steam turbine expediently the relaxed and overheated first partial stream fed to a steam turbine.
- the saturated steam is advantageously from a steam drum the water-steam cycle of a steam turbine.
- the stated object is achieved according to the invention from saturated steam by means of a heat exchanger, the primary side and over a throttle element connected on the secondary side to a saturated steam reservoir is.
- the throttle body expediently a controllable throttle valve.
- the heat exchanger is connected on the secondary side to a steam turbine.
- the saturated steam reservoir is advantageously one in the water-steam cycle a steam turbine switched steam drum.
- the stated object is achieved according to the invention by the steam turbine is a separate one connected to the steam drum
- the sealing steam line opens into the secondary side Heat exchanger connected on the primary side to the steam drum is switched.
- the advantages achieved with the invention are in particular in that by overheating the relaxed first Partial flow of saturated steam through heat exchange with a second Partial flow of saturated steam a reliable generation of superheated steam guaranteed with particularly simple means is. Especially with a steam power plant with frequent Night shutdowns are therefore a supply to the steam turbine with superheated steam as barrier steam when restarting guaranteed without an additional heating or Overheating device is required.
- An embodiment of the invention is based on a Drawing explained in more detail.
- the figure shows schematically a steam power plant.
- the steam power plant 1 comprises a steam turbine 2, via a turbine shaft 4 with a generator 6 connected is.
- the steam turbine 2 is on the output side a steam line 10 connected to a condenser 12.
- the condenser 12 is via a line 14, into which a condensate pump 16 is switched, with a feed water tank 18 connected.
- the feed water tank 18 is on the output side via a feed line 20 into which a feed water pump 22 is connected to a steam drum 24.
- For Preheating of the feed water to be supplied from the steam drum 24 S can be a number of preheater heating surfaces, not shown, in line 20 or an economizer.
- the steam drum 24 is on the water outlet side and on the steam inlet side with one arranged in a steam generator 26 Evaporator 28 connected.
- the steam generator 26 can be a fossil or nuclear-fired steam generator or a Heat recovery steam generator.
- a useful steam outlet 30 is arranged, which in a Evaporator 26 arranged superheater 32 to the steam turbine 2 is connected.
- the steam turbine 2 can comprise one or more pressure stages. Depending on the number of pressure levels and the design of the Water-steam circuit 34 of the steam turbine 2 can additionally to the heating surfaces 28 and 32 shown in the figure additional heating surfaces can be provided.
- a sealing steam line 40 is connected to the steam drum 24, via which 2 steam can be fed to the steam turbine 2 is.
- a controllable Throttle valve trained throttle member 42 switched.
- a heat exchanger in the sealing steam line 40 44 switched on the secondary side.
- the heat exchanger 44 is on the primary side via a branching off from the sealing steam line 40 Partial flow line 46 connected to the steam drum 24.
- the steam drum 24 When the steam power plant 1 is operated, the steam drum 24 the water W supplied to the evaporator 28 completely or there partially evaporated and as steam D or water-steam mixture WD returned to the steam drum 24. In the steam drum 24 the steam D is separated from the water W. The steam D is itself in the steam drum 24 with the water W in the thermodynamic Equilibrium and therefore lies as saturated steam in front.
- Hot useful steam N which is under pressure can be used in the steam drum 24 removed and over the superheater 32 of the steam turbine 2 are fed where he relaxes work-performing.
- barrier steam SD is supplied to an area between the turbine shaft 4 and the housing of the steam turbine 2, particularly during a startup process.
- a partial stream t 1 of steam D present as saturated steam is removed from the steam drum 24 serving as a saturated steam reservoir.
- the partial flow t 1 is throttled via the controllable throttle valve or the throttle member 42 in such a way that its pressure level is adapted to the requirements of the steam turbine 2.
- the throttling lowers the temperature level of the partial flow t 1 .
- the partial flow t 1 is overheated by a heat exchange of the unthrottled second partial flow t 2 with the throttled first partial flow t 1 in the heat exchanger 44. This superheated partial flow t 1 can then be fed to the steam turbine 2 as sealing steam SD without it being exposed to a risk of corrosion.
- the steam power plant 1 is therefore particularly suitable for frequent restarting of the steam turbine 2, in particular after a night standstill.
- the steam D present in the steam drum 24 as saturated steam has a temperature of approximately 210 ° C.
- the partial flow t 1 has a temperature of approximately 150 ° C. after it has been throttled.
- this temperature can be increased to approximately 180 ° C. without the need for an additional superheater device.
- the overheating of the partial stream t 1 is thus ensured with particularly simple means and particularly reliably.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
Claims (3)
- Verfahren zur Erzeugung von Sperrdampf für eine Dampfturbine (2), bei dem ein aus einer Dampftrommel (24) entnommener erster Teilstrom (t1) von Sattdampf gedrosselt wird, bevor er durch Wärmetausch mit einem zweiten Teilstrom (t2) des Sattdampfes überhitzt wird.
- Dampfkraftanlage (1) mit einer Dampfturbine (2), in deren Wasser-Dampf-Kreislauf (34) eine Dampftrommel (24) geschaltet ist, wobei in die Dampfturbine (2) eine an die Dampftrommel (24) angeschlossene separate Sperrdampfleitung (40) mündet, in die sekundärseitig über ein Drosselorgan (42) ein primärseitig an die Dampftrommel (24) angeschlossener Wärmetauscher (44) geschaltet ist.
- Verwendung des nach dem Verfahren nach Anspruch 1 erzeugten Sperrdampfes zum Anfahren einer Dampfturbine (2) einer Dampfkraftanlage (1).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19538674A DE19538674A1 (de) | 1995-10-17 | 1995-10-17 | Verfahren und Einrichtung zur Erzeugung von überhitztem Dampf aus Sattdampf sowie Dampfkraftanlage |
DE19538674 | 1995-10-17 | ||
PCT/DE1996/001927 WO1997014285A2 (de) | 1995-10-17 | 1996-10-08 | Verfahren und einrichtung zur erzeugung von überhitztem dampf aus sattdampf sowie dampfkraftanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0856126A2 EP0856126A2 (de) | 1998-08-05 |
EP0856126B1 true EP0856126B1 (de) | 2000-02-23 |
Family
ID=7775097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96945485A Expired - Lifetime EP0856126B1 (de) | 1995-10-17 | 1996-10-08 | Verfahren zur Erzeugung von Sperrdampf für eine Dampfturbine, sowie entsprechende Dampfkraftanlage |
Country Status (8)
Country | Link |
---|---|
US (1) | US6003317A (de) |
EP (1) | EP0856126B1 (de) |
DE (2) | DE19538674A1 (de) |
ES (1) | ES2143803T3 (de) |
IN (1) | IN190405B (de) |
MY (1) | MY129600A (de) |
TW (1) | TW325513B (de) |
WO (1) | WO1997014285A2 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19919653A1 (de) * | 1999-04-29 | 2000-11-02 | Abb Alstom Power Ch Ag | Sperrdampfeinspeisung |
US6921858B2 (en) * | 2002-11-08 | 2005-07-26 | Bechtel Bwxt Idaho, Llc | Method and apparatus for pressurizing a liquefied gas |
US7325400B2 (en) * | 2004-01-09 | 2008-02-05 | Siemens Power Generation, Inc. | Rankine cycle and steam power plant utilizing the same |
EP1961921A1 (de) * | 2007-02-26 | 2008-08-27 | Siemens Aktiengesellschaft | Dichtung für eine Strömungsmaschine |
US8424281B2 (en) * | 2007-08-29 | 2013-04-23 | General Electric Company | Method and apparatus for facilitating cooling of a steam turbine component |
GB2457266B (en) * | 2008-02-07 | 2012-12-26 | Univ City | Generating power from medium temperature heat sources |
US8347598B2 (en) | 2011-03-18 | 2013-01-08 | General Electric Company | Apparatus for starting up combined cycle power systems and method for assembling same |
DE102012019167A1 (de) * | 2012-09-28 | 2014-04-03 | Man Diesel & Turbo Se | Sperrdampfsystem |
CN104088677B (zh) * | 2014-06-25 | 2016-03-02 | 北京越麓咨询有限责任公司 | 一种多级冲动式汽轮机的机内蒸汽再热器 |
CN108779405B (zh) * | 2016-03-14 | 2020-11-24 | 托普索公司 | 用于生产甲烷化气体的方法和设备 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH367520A (de) * | 1959-04-22 | 1963-02-28 | Sulzer Ag | Verfahren und Vorrichtung zur Erzeugung von Sperrdampf |
DE1105431B (de) * | 1959-04-22 | 1961-04-27 | Sulzer Ag | Einrichtung zur Lieferung von Sperrdampf fuer Dichtungsstellen in Dampfkraftanlagen,insbesondere Dampfturbinenanlagen |
SE373196B (de) * | 1973-12-10 | 1975-01-27 | Svenska Maskinverken Ab | |
US4474010A (en) * | 1980-02-15 | 1984-10-02 | Sumitomo Semento Kabushiki Kaisha | Method of recovering exhaust gas from boiler in electrical power generating device using combustible material as fuel and apparatus for performing such method |
JPS5951109A (ja) * | 1982-09-17 | 1984-03-24 | Hitachi Ltd | 蒸気原動所の復水器真空保持装置 |
US4873829A (en) * | 1988-08-29 | 1989-10-17 | Williamson Anthony R | Steam power plant |
JPH03275903A (ja) * | 1990-03-23 | 1991-12-06 | Toshiba Corp | 蒸気タービンプラントの起動方法およびその方法に使用する復水装置 |
US5412936A (en) * | 1992-12-30 | 1995-05-09 | General Electric Co. | Method of effecting start-up of a cold steam turbine system in a combined cycle plant |
-
1995
- 1995-10-17 DE DE19538674A patent/DE19538674A1/de not_active Withdrawn
-
1996
- 1996-10-01 TW TW085111938A patent/TW325513B/zh not_active IP Right Cessation
- 1996-10-08 WO PCT/DE1996/001927 patent/WO1997014285A2/de active IP Right Grant
- 1996-10-08 EP EP96945485A patent/EP0856126B1/de not_active Expired - Lifetime
- 1996-10-08 DE DE59604502T patent/DE59604502D1/de not_active Expired - Lifetime
- 1996-10-08 ES ES96945485T patent/ES2143803T3/es not_active Expired - Lifetime
- 1996-10-11 IN IN1799CA1996 patent/IN190405B/en unknown
- 1996-10-15 MY MYPI96004286A patent/MY129600A/en unknown
-
1998
- 1998-04-17 US US09/062,627 patent/US6003317A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
IN190405B (de) | 2003-07-27 |
DE59604502D1 (de) | 2000-03-30 |
WO1997014285A3 (de) | 1997-07-03 |
MY129600A (en) | 2007-04-30 |
TW325513B (en) | 1998-01-21 |
US6003317A (en) | 1999-12-21 |
WO1997014285A2 (de) | 1997-04-24 |
ES2143803T3 (es) | 2000-05-16 |
EP0856126A2 (de) | 1998-08-05 |
DE19538674A1 (de) | 1997-04-24 |
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