EP0773348B1 - Verfahren und Anordnung zum Vorwärmen des Hauptkondensats in Kraftwerksprozessen - Google Patents
Verfahren und Anordnung zum Vorwärmen des Hauptkondensats in Kraftwerksprozessen Download PDFInfo
- Publication number
- EP0773348B1 EP0773348B1 EP96114056A EP96114056A EP0773348B1 EP 0773348 B1 EP0773348 B1 EP 0773348B1 EP 96114056 A EP96114056 A EP 96114056A EP 96114056 A EP96114056 A EP 96114056A EP 0773348 B1 EP0773348 B1 EP 0773348B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- condensate
- ndv
- low
- preheater
- 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
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/40—Use of two or more feed-water heaters in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/34—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines and returning condensate to boiler with main feed supply
Definitions
- the invention relates to a method for preheating the Main condensate in a power plant process. Furthermore concerns the invention an arrangement according to the preamble of Claim 5.
- (A) is an arrangement for preheating the Main condensate in power plant processes with one Low pressure preheater known, with a heating steam connection is connected to a tap of a low pressure turbine.
- a heat exchanger chamber of a low pressure preheater is a steam jet connected upstream, its motive steam connection is fed from a second turbine tap and its Intake connection with the last tap of the Low pressure turbine is connected.
- the invention is based on the knowledge that in particular a noticeable when planning new power plants Improve circulatory efficiency and the cost-benefit ratio when preheating the feed water appropriate procedure for preheating condensate and their integration into the LP preheating line can be achieved can. This is the object of the invention.
- the arrangement according to the invention is characterized by this that a heating condensate outlet of the low pressure preheater is connected to a condensate lifter that a motive steam connection of the condensate lifter with steam at higher pressure levels is acted upon, and that the delivery outlet of the Condensate collector with the main condensate line downstream of the Low pressure preheater is connected.
- a major advantage of the invention is that saturated water accumulating in power plant processes is cavitation-free and is promoted extremely economically. Saturated water falls particularly in the low-pressure preheating line in the form of heating condensate; but it also arises when using a steam air preheater. With the same Advantages of the invention can be used wherever high pressure change speeds on the suction side of the fluids to be promoted to a cavitation hazard Pumps can lead.
- a double chamber low pressure preheater is used its first chamber with bleed steam and its second chamber with a vapor mixture obtained by thermocompression is applied.
- the low-pressure preheating line shown in the circuit diagram in FIG. 1 1 has low pressure preheaters NDV 1a / 1b and NDV 2a / 2b, four condensate lifters 50, 51, 52 and 53 and a motive steam busbar 20 on.
- the condensate lifters 50 ... 53 As partial steam. That steam is then returned to the water-steam cycle at a suitable point involved.
- the first preheating stage NDV la largely relaxed steam is supplied from tap A1. Heating condensate accumulating in the NDV 1a is via a Line 10 fed to and from the condensate lifter 50 conveyed via a line 11 into the main condensate stream 3.
- the second preheating stage NDV 1b receives a steam mixture a steam jet 30, the steam from the tap A2 a motive steam connection 31 is supplied and via a Suction steam connection 32 from the exergetically inferior steam of the A1 tap. By compressing the suction Steam in the steam jet 30 becomes the condensation temperature raised.
- the heating condensate obtained in the NDV 1b stage is fed to the condensate lifter 51 via a line 12 and from this via a line 13 into the main condensate stream 3 promoted.
- the integration of the downstream preheating stages NDV 2a and NDV 2b, their application of bleed steam and the cavitation-free Pumping saturated water using the condensate lifter 52 and 53 are analog.
- the motive steam for the condensate lifter 52 and 53 also becomes the motive steam busbar 20 taken.
- the preheating stage NDV 2a receives steam from tap A2.
- the heating condensate from the preheating stage NDV 2a is fed to condensate lifter 52 via line 14 and from this via line 15 into the main condensate stream 3 funded.
- the next stage NDV 2b becomes one Steam mixture supplied from a steam jet 40, the Driving steam connection 31 is connected to a tap A3 and the steam from the tap via a suction steam connection 42 A2 sucks.
- the double chamber preheater shown in Fig. 2 is in described embodiment of known type.
- the Main condensate emerges from the main condensate line 3 into a inlet-side water chamber 4a, is in a first Heat exchanger chamber (preheating level NDV 1a) with bleed steam A1 and pressure-tight in one of the first heat exchanger chamber Completed second heat exchanger chamber (preheating stage NDV 1b) acted upon by the steam mixture from the steam jet 30 and finally flows over an outlet side Water chamber 4b in a subsequent section of the main condensate line 3rd
- bleed steam A1 is removed from the motive steam sucked in from A2 by pulse exchange and flows Pressure increase in the diffuser in the NDV 1b. That in the NDV la accruing heating condensate is through a shut-off valve 60 and a check valve 61 via line 10 in the condensate lifter 50 headed.
- a shut-off valve 60 and a check valve 61 via line 10 in the condensate lifter 50 headed.
- the system consisting of NDV 1b and condensate lifter 51 is structured analogously and works accordingly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Jet Pumps And Other Pumps (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Control Of Turbines (AREA)
Description
Claims (7)
- Verfahren zum Vorwärmen des Hauptkondensats in einem Kraftwerksprozeß mit einem Wasserdampfkreislauf,wobei Anzapfdampf unter Erwärmen von Hauptkondensat in einem Niederdruck-Vorwärmer (NDV 1a, 1b, 2a, 2b) kondensiert und entstehendes Heizkondensat dem Hauptkondensatstrom zugeführt wird,wobei ferner aus dem Wasserdampfkreislauf Dampf eines höheren Druckniveaus als der als Heizdampf dienende Anzapfdampf, einem Kondensatheber (50, 51, 52, 53) als Treibdampf zugeführt wird; undwobei das Heizkondensat aus dem Niederdruck-Vorwärmer von dem Kondensatheber in den den Vorwärmer (NDV 1b, NDV 2b) verlassenden Hauptkondensatstrom gefördert wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Doppelkammer-Niederdruck-Vorwärmer (NDV 1a, 1b) verwendet wird, dessen erste Kammer (NDV 1a) mit weitgehend entspanntem Dampf und dessen zweite Kammer (NDV 1b) mit einer durch Thermokompression gewonnenen Dampfmischung beaufschlagt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Treibdampf für die Kondensatheber (50, 51) einer Treibdampf-Sammelschiene (20) entnommen wird.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß ein Teilstrom aus dem die erste Kammer (NDV 1a) des Niederdruckvorwärmers mit Heizdampf versorgenden Dampfstrom abgezweigt und als Ansaugdampf bei der Thermokompression verwendet wird.
- Anordnung zum Vorwärmen des Hauptkondensats in Kraftwerksprozessen mit einem Niederdruck-Vorwärmer (NDV 1a, 1b, 2a, 2b), dessen Heizdampfanschluß mit einer Anzapfung (A1, A2, A3) einer Niederdruck-Turbine (5) verbunden ist,
dadurch gekennzeichnet,daß zur Durchführung des Verfahrens nach Anspruch 1 wenigstens ein Heizkondensat-Austritt (10; 12) des Niederdruck-Vorwärmers (NDV 1a, 1b, 2a, 2b) mit einem Kondensatheber (50,51,52,53) verbunden ist;daß ein Treibdampfanschluß des Kondensathebers an eine Treibdampf-Sammelschiene (20) angeschlossen ist unddaß der Förderauslaß (11, 13, 15, 17) des Kondensathebers mit der Hauptkondensatleitung (3) stromab des zugehörigen Niederdruck-Vorwärmers verbunden ist. - Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß der Niederdruck-Vorwärmer als Doppelkammervorwärmer (NDV 1a,1b) ausgebildet ist, dessen erste Wärmetauscherkammer mit der letzten Anzapfung (A1) einer Niederdruckturbine (5) verbunden ist und dessen zweiter Wärmetauscherkammer ein Dampfstrahler (30) vorgeschaltet ist, dessen Treibdampfanschluß (31) aus einer zweiten Turbinenanzapfung (A2) gespeist wird.
- Anordnung nach Anspruch 6, dadurch gekennzeichnet, daß der Ansauganschluß (32) des Dampfstrahlers (30) und die erste Wärmetauscherkammer aus der gleichen Dampfquelle (A1) gespeist sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19541543 | 1995-11-08 | ||
DE19541543A DE19541543C2 (de) | 1995-11-08 | 1995-11-08 | Verfahren und Anordnung zum Vorwärmen des Hauptkondensats in Kraftwerksprozessen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0773348A1 EP0773348A1 (de) | 1997-05-14 |
EP0773348B1 true EP0773348B1 (de) | 2001-03-14 |
Family
ID=7776875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96114056A Expired - Lifetime EP0773348B1 (de) | 1995-11-08 | 1996-09-03 | Verfahren und Anordnung zum Vorwärmen des Hauptkondensats in Kraftwerksprozessen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0773348B1 (de) |
AT (1) | ATE199763T1 (de) |
DE (2) | DE19541543C2 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19806238C1 (de) * | 1998-02-16 | 1999-04-15 | Steag Ag | Wärmetauscheranordnung |
FI118237B (fi) * | 2004-11-03 | 2007-08-31 | Waertsilae Finland Oy | Menetelmä ja järjestelmä lämmön talteenottamiseksi |
DE102011078193A1 (de) * | 2011-06-28 | 2013-01-03 | Siemens Aktiengesellschaft | Zusätzliche Regelanzapfung für einen Vorwärmer zur Verbesserung der Anlagendynamik und Frequenzregelung bei einem Dampfkraftwerk |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB971195A (en) * | 1962-07-23 | 1964-09-30 | Ass Elect Ind | Improvements in steam turbine power plants |
DE1551263A1 (de) * | 1965-03-01 | 1969-05-29 | Steinmueller Gmbh L & C | Kreisprozess fuer Dampfkraftanlagen |
JPS61126309A (ja) * | 1984-11-22 | 1986-06-13 | Toshiba Corp | 蒸気発電プラント |
DE3616797A1 (de) * | 1986-05-17 | 1987-11-19 | Koerting Ag | Dampfturbinenanlage |
-
1995
- 1995-11-08 DE DE19541543A patent/DE19541543C2/de not_active Expired - Fee Related
-
1996
- 1996-09-03 AT AT96114056T patent/ATE199763T1/de active
- 1996-09-03 DE DE59606584T patent/DE59606584D1/de not_active Expired - Lifetime
- 1996-09-03 EP EP96114056A patent/EP0773348B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0773348A1 (de) | 1997-05-14 |
DE19541543C2 (de) | 1997-10-16 |
DE59606584D1 (de) | 2001-04-19 |
ATE199763T1 (de) | 2001-03-15 |
DE19541543A1 (de) | 1997-07-03 |
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