DE1601005C3 - Device for intercepting load surges in large steam power plants with flow boilers - Google Patents
Device for intercepting load surges in large steam power plants with flow boilersInfo
- Publication number
- DE1601005C3 DE1601005C3 DE19671601005 DE1601005A DE1601005C3 DE 1601005 C3 DE1601005 C3 DE 1601005C3 DE 19671601005 DE19671601005 DE 19671601005 DE 1601005 A DE1601005 A DE 1601005A DE 1601005 C3 DE1601005 C3 DE 1601005C3
- Authority
- DE
- Germany
- Prior art keywords
- condensate
- steam
- power
- valve
- pressure
- 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
Links
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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
sen ist, daß etwa 10 bis 15 Minuten lang Vollastbe- 4 a abgeschaltet. Dabei muß sichergestellt sein, daßsen is that about 10 to 15 minutes full load 4 a switched off. It must be ensured that
trieb gefahren werden kann. Hinsichtlich des Kon- die Kondensatpumpe 4 b mit ihrer Mindestmengedrive can be driven. With regard to the condensate pump 4 b with its minimum amount
densator-Hotwells wird eine Speicherfähigkeit benö- läuft. Das Ventil 10 α schließt jetzt nach etwa 10 bisDensator hotwells require a storage capacity. The valve 10 α now closes after about 10 to
tigt, die den maximalen Kondensatstrom für etwa 3 20 Sekunden. Die abgeschaltete Kondensatpumpe 4 αthat takes the maximum condensate flow for about 3 20 seconds. The switched off condensate pump 4 α
Minuten zu speichern gestattet. Sollte der Hotwell des 5 läuft in etwa 10 Sekunden aus, wobei die FörderungAllowed to save minutes. Should the hotwell of the 5 run out in about 10 seconds, the promotion
Kondensators hierfür nicht ausreichend bemessen durch Nachströmen bereits in etwa 2 Sekunden be-Capacitor not sufficiently dimensioned for this due to post-flow already in about 2 seconds
sein, so könnte gegebenenfalls im Niveau des Hot- endet ist und die Niederdruckvorwärmer 5 ungefährso could possibly end at the level of the hot end and the low-pressure preheater 5 approximately
wells ein Zusatzbehälter ausreichender Größe paral- in der gleichen Zeit keinen Anzapfdampf mehr zie-wells an additional tank of sufficient size in parallel - at the same time no more bleed steam
IeI zu diesem angeschlossen werden. hen. Durch die Steuerung der beiden Kondensatpum-IeI to be connected to this. hen. By controlling the two condensate pumps
An Hand der Zeichnung wird ein Ausführungsbei- to pen 4a und 4b kann trotz schneller Ausführung der spiel der Erfindung erläutert. Der vom Kessel 1 er- Schaltbefehle ein weiches Abschalten des Kondensatzeugte und überhitzte Dampf wird der Turbine 2 zu- stromes erreicht werden, so daß hydraulische Stöße geführt. Vom Hotwell des Turbinenkondensators 3 im Kondensatstrom ein unzulässiges Maß nicht überführen Leitungen, in denen Kondensatpumpen 4 α schreiten.With the help of the drawing, an exemplary embodiment 4a and 4b can be explained despite the rapid execution of the game of the invention. The switching commands from boiler 1 to gently switch off the condensate and superheated steam will be reached to the turbine 2, so that hydraulic shocks are carried out. Lines in which condensate pumps 4 α step from the hotwell of the turbine condenser 3 in the condensate flow do not transfer an impermissible amount.
und 4 b angeordnet sind, zu den Niederdruckvorwär- 15 Je nach der für eine Frequenzstützung erforderli-and 4 b are arranged, to the low pressure preheating 15 Depending on the frequency support required
mern 5 und weiter zum Speisewasserbehälter 6. Mit 7 chen Zeit, d. h. nach wirksamem Einsatz der gestei-mern 5 and on to the feed water tank 6. With 7 times, d. H. after the effective use of the
ist die Kesselspeisepumpe und mit 8 die Hochdruck- gerten Kesselleistung, die sich beispielsweise nachis the boiler feed pump and, with 8, the high-pressure boiler output, which is for example after
vorwärmanlage bezeichnet. etwa 2 Minuten auswirkt, längstens jedoch nach derpreheating system called. takes effect for about 2 minutes, but no longer than after
Es ist ein Schaltgerät 11 vorgesehen, das, wie die Füllzeit des Hotwells wird die KondensatförderungA switching device 11 is provided which, like the filling time of the hotwell, pumping the condensate
Signallinie α zeigt, einen Grenzimpuls für Drehzahl 20 wieder aufgenommen. Über die Signallinie b kann Signal line α shows a limit pulse for speed 20 resumed. Via the signal line b can
oder Frequenz erhält. Mit Z? ist ein Grenzimpuls für dabei ein Niveauimpuls vom Hotwell her auf dasor frequency receives. With Z? is a limit impulse for a level impulse from the hotwell to the
Füllung des Hotwells des Kondensators 3 versinn- Schaltgerät 11 gegeben werden. Es ist aber auchFilling of the hotwell of the capacitor 3 versinn- switching device 11 are given. It is also
bildlicht. Die Wirklinie c gibt Befehle an die An- möglich, für sich allein oder zusätzlich hierzu vonimage light. The line of action c gives commands to the possible, by itself or in addition to this
triebsmotoren M1, M 2 der Kondensatpumpen 4 α einem Zeitschalter 9 aus über die Signallinie e einenDrive motors M1, M 2 of the condensate pumps 4 α a timer 9 from via the signal line e one
und 4 b. In entsprechender Weise werden über die 25 entsprechenden Zeitimpuls auf das Schaltgerät 11 zuand 4 b. In a corresponding manner, the corresponding time pulse is applied to the switching device 11 via the 25
Wirklinien die Befehle an die Antriebe M 3 und M 4 übermitteln. Das Schaltgerät 11 bewirkt nun über dieLines of action transmit the commands to the drives M 3 and M 4. The switching device 11 now causes the
der den Kondensatpumpen jeweils nachgeschalteten Wirklinie d einen Befehl zum Öffnen des Ventils the line of action d connected downstream of the condensate pumps sends a command to open the valve
Ventile 10 α und 10 b gegeben. 10 b. Valves 10 α and 10 b given. 10 b.
Wenn eine Frequenzabsenkung von der vorge- Nun wird die angestaute Kondensatmenge vom schriebenen Netzfrequenz von beispielsweise 50Hz 30 Hotwell des Kondensators 3 zum Speisewasserbehälauf einen Wert von 49,96 Hz oder weniger erfolgt, ter 6 hin gefördert, wobei eine vergrößerte Pumpenwas einer Drehzahlabsenkung der Dampfturbine um leistung, beispielsweise 120 % der Auslegung, zur 0,08 °/o entspricht, schaltet sich bei in Betrieb befind- Anwendung kommen kann. Auf diese Weise befindet licher Kondensatpumpe 4 α die Kondensatpumpe 4 b sich die Anlage bereits in 10 bis 15 Minuten wieder ein, wobei das zugehörige Ventil 10 b gemäß einem 35 im Ausgangszustand, wobei die weitere Kondensatschon früher gegebenen Befehl sich in geschlossenem förderung von der Kondensatpumpe 4 b übernom-Zustand befindet. Es wird dabei vorausgesetzt, daß men ist, so daß die zuvor betriebene Kondensatdie beiden Kondensatpumpen 4 α und 4 b mit vertret- pumpe 4 α nicht zugeschaltet zu werden braucht, barer Mindestmenge längere Zeit laufen können. Während dieses Vorganges wird die DampfleistungIf a frequency decrease from the pre-Now the accumulated amount of condensate from the written network frequency of, for example, 50Hz 30 Hotwell of the condenser 3 to the feed water tank a value of 49.96 Hz or less occurs, ter 6, with an increased pump which results in a reduction in the speed of the steam turbine power, for example 120% of the design, corresponds to 0.08%, switches on when in operation. In this way, Licher condensate pump 4 α, the condensate pump 4 b , the system is on again in 10 to 15 minutes, with the associated valve 10 b according to a 35 in the initial state, the further condensate already given command is in closed delivery from the condensate pump 4 b is taken over. It is assumed that the condensate previously operated, the two condensate pumps 4 α and 4 b with representative pump 4 α does not need to be switched on, can run for a longer period of time. During this process, the steam output
Steigt die Frequenz wieder an, so wird bei etwa 4° des Kessels entsprechend gesteigert, damit sich der 49,98 Hz die Kondensatpumpe 4 b selbsttätig wieder Kraftwerksblock nach Beendigung des VorgangesIf the frequency rises again, the boiler is increased accordingly at around 4 ° so that the condensate pump 4 b automatically turns itself back to the 49.98 Hz power plant unit after the process has ended
abgeschaltet. Fällt dagegen die Frequenz auf bei- wieder in Normalbetrieb mit höherer Leistung imswitched off. If, on the other hand, the frequency falls back to normal operation with higher power in the
spielsweise 49,94 Hz, so wird die Kondensatpumpe Bereich der Nennfrequenz befindet.for example 49.94 Hz, the condensate pump is located in the range of the nominal frequency.
Claims (1)
Wirkverbindung steht, daß bei Beginn des Last- Die Einrichtung nach der Erfindung macht vonDevice for intercepting load surges bine. The limitation of the utilization now needs large steam power plants with flow boilers, only that of the released amount of bleed steam with which the conveyed amount of condensate corresponds to the achievable additional output, if the reduction of the regenerative preheating of the steam turbine is temporarily reduced during a frequency support, thus gone full should work at full capacity. In this case, indicates that a switching device (11) with 5% more power is the limit at 95 0 Zo the drives of two parallel connected the maximum possible power compared to the one-condensate pumps (4 a, 4 b) and of these io described above Mode of operation in which the downstream valves (10 a, 10 b) are in this way in stungsbegrenzung at about 85%.
Operational connection is that at the beginning of the load The device according to the invention makes of
Abfangen von Laststößen bei großen Dampfkraftan- Aus der Dissertation von Harry Thielen: »DieThe invention relates to measures for the discharge of the main condensate stream.
Interception of load surges with large steam power- From Harry Thielen's dissertation: »The
den. Die hierdurch bedingte Begrenzung der Maschi- Grundsätzlich ist es zwar üblich und bekannt, beiIn the high-pressure part of the steam turbine work to be carried out intercepting load surges of large steam power plants, while only after charging the intermediate boiler, in which the conveyed cone superheater with a time delay then also the amount of densate to reduce the regenerative medium-pressure and low-pressure part of the turbine 45 preheating is temporarily reduced. That more power can participate. Experience has shown that the new thing is that a switchgear with itself only about 20 seconds after the start of the operation. In the tilen is so in operative connection that at the beginning of the further course the additional power 5 ° of the load surge decreases the one condensate pump with minimum supply relatively quickly and has the least amount of delivery with closed, post-time, where an increased steam output of the boiler switched valve in Operation is kept so that it begins to take effect, generally the initial shutdown of the condensate flow, the drive, the value of the additional power has already fallen below. If the other condensate pump is switched off and the additional output from the 55 ßend this downstream valve is closed storage capacity, for example, still 5% of the nominal and that to resume the condensate output is to be, the turbine must be a pump that is kept in operation Condensate swallowing reserve of almost 15%> held in reserve, the downstream valve is opened,
the. The resulting limitation of the machi- Basically it is common and known with
973 977 bekannte Lösung zum Einsatz großer Kraft- Für das Arbeiten einer solchen Einrichtung ist einAnother purpose from the German patent specification, but only for reserve purposes.
973 977 known solution to the use of great force- For the work of such a device is a
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES0113497 | 1967-12-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1601005A1 DE1601005A1 (en) | 1970-05-06 |
DE1601005B2 DE1601005B2 (en) | 1974-01-24 |
DE1601005C3 true DE1601005C3 (en) | 1974-08-22 |
Family
ID=7532562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19671601005 Expired DE1601005C3 (en) | 1967-12-23 | 1967-12-23 | Device for intercepting load surges in large steam power plants with flow boilers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1601005C3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4478783A (en) * | 1981-12-07 | 1984-10-23 | The Babcock & Wilcox Company | Nuclear power plant feedwater controller design |
-
1967
- 1967-12-23 DE DE19671601005 patent/DE1601005C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1601005A1 (en) | 1970-05-06 |
DE1601005B2 (en) | 1974-01-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
E771 | Valid patent as to the heymanns-index 1977, willingness to grant licences | ||
EHJ | Ceased/non-payment of the annual fee |