DE1934926A1 - Device for starting and restarting a once-through boiler - Google Patents
Device for starting and restarting a once-through boilerInfo
- Publication number
- DE1934926A1 DE1934926A1 DE19691934926 DE1934926A DE1934926A1 DE 1934926 A1 DE1934926 A1 DE 1934926A1 DE 19691934926 DE19691934926 DE 19691934926 DE 1934926 A DE1934926 A DE 1934926A DE 1934926 A1 DE1934926 A1 DE 1934926A1
- Authority
- DE
- Germany
- Prior art keywords
- reheater
- steam
- vessel
- pressure
- restarting
- 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.)
- Pending
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
- 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
-
- 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
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
- F01K3/20—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by combustion gases of main boiler
- F01K3/22—Controlling, e.g. starting, stopping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
- F22B35/14—Control systems for steam boilers for steam boilers of forced-flow type during the starting-up periods, i.e. during the periods between the lighting of the furnaces and the attainment of the normal operating temperature of the steam boilers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Turbines (AREA)
Description
Einrichtung zum Anfahren und Wiederanfahren eines Durchlaufkessels Die Erfindung bezieht sich auf ein Anfahrsystem für Durch laufkessel mit Zwischenentapannung des mittels einer Hochdruck-2rennvorrichtung abgeschiedenen Wassers in einem-Anfahrgefäß. In zunehmendem Maße werden Durchlaufkessel aus jedem Betriebszustand mit trockenem Überhitzer angefahren. Hierzu pflegt man im Bereich zwischen Verdampfer und Überhitzer oder in angrenzenden Heizflächen, z.B. hinter dem ersten Strahlungsüberhitzer, eine Was'ser-ampf-Trennvorrichtung anzuordnen.Device for starting up and restarting a once-through boiler The invention relates to a start-up system for through-flow kettles with intermediate tapping of the water separated by means of a high-pressure separation device in a start-up vessel. Increasingly, once-through boilers are dry from any operating condition Superheater started up. To do this, care is taken in the area between the evaporator and superheater or in adjacent heating surfaces, e.g. behind the first radiant superheater, one Was'ser-ampf-separating device to be arranged.
Während des Anfahrens oder Wiederanfahrens wird das aus den davor liegenden Heizflächen kommende Wasser-Dampf-Gemisch getrennt. Der Dampf strömt dabei weiter in die Überhitzerheizflächen, während das abgetrennte Wasser huber ein Regelventil in ein Anfahrgefäß geleitet wird. Vielfach legt man- das Anfahrgefäß auf eine niedrigere Druckstufe und kann, falls das Regelventil nicht selbst zur Druckreduzierung herangezogen wird, dem Regelventil eine Reduzierstation zuordnen.During start-up or restarting, this becomes of the previous ones Water-steam mixture coming from lying heating surfaces is separated. The steam flows in the process further into the superheater heating surfaces, while the separated water via a control valve is fed into a start-up vessel. In many cases, the start-up vessel is placed on a lower one Pressure stage and can, if the control valve is not used to reduce the pressure itself assign a reducing station to the control valve.
Bei den bisher bekannten Dampfkraftanlagen wird der im Anfahrgefäß anfallende Entspannungsdampf in den Zwischenüberhitzer geleitet, während das Wasser in eihen geeigneten Behalter, z.B. den Speisewasserbehälter, abgeführt wird. Während des Warm- und Heißstartes können bei einem solchen Anfahrsystem Schwierigkeiten auftreten. Zu Beginn des Warmstartes wird namlich nahezu die gesamte Anfahrwassermenge in der Hochdruczk-Trennvorrichtung abgeschieden und in das Anfahrgefäß geleitet.In the previously known steam power plants, the in the start-up vessel Accidental expansion steam is passed into the reheater while the water is discharged into a suitable container, e.g. the feed water tank. While warm and hot starts can cause difficulties with such a start-up system appear. At the beginning of the warm start, almost the entire amount of start-up water is used deposited in the Hochdruczk separator and fed into the start-up vessel.
Je höher der zu diesem Zeitpunkt noch vorhandene Druck im Hochdrucksystem des Dampferzeugers ist, eine um so größere Enthalpie besitzt das AblauBwasser, sodaß bei der Entspannung grobe Dampfmengen entstehen. Diese großen Entspannungsdampfengen durchströmen jetst den Zwischenüberhitzer, sodaß am Zwischenüberhitzeraustritt ein Temperaturzusammenbruch unvermeidlich wird. Die noch heiße Dampfturbine kann dann zunächst noch nicht angestoßen werden.The higher the pressure still present in the high pressure system at this point in time of the steam generator, the enthalpy is all the greater, so that the waste water in relaxation large amounts of steam are generated. These big relaxation steamers now flow through the reheater, so that at the reheater outlet Temperature collapse becomes inevitable. The still hot steam turbine can then not yet initiated.
Der Erfindung liegt die Aufgabe zugrunde; diese Nachteile zu vermeiden. Die Erfindung besteht darin, daß bei einer Einrichtung zum Anfahren und Wiederanfahren der geschtlderten Art der Dampfraum des Anfahrgefäßes einerseits über eine Leitung mit einer absperrbaren Reduzierstation mit dem Turbinenkondensator in Verbindung steht und andererseits durch eine Rückschlagarmatur vom Zwischenüberhitzer, insbesondere Zwischenüberhitzereintritt, getrennt ist. Der Entspannungsdampf strömt vom Anfahrgefäß nur dann zum Zwischenüberhitzer, wenn der Druck im Anfahrgefäß den Zwischenüberhitzerdruck um einen bestimmten Wert überschreitet. Die gesamte oder zumindest überwiegende Entspannungsdampfmenge gelangt also unmittelbar in den Turbinenkondensator, sodaß der heiße Zwischenüberhitzer durch Entspannungsdampf nicht mehr unnötig abgekühlt wird.The invention is based on the object; to avoid these disadvantages. The invention consists in that in a device for starting and restarting of the switched type of the steam space of the start-up vessel on the one hand via a line with a lockable reducing station in connection with the turbine condenser and on the other hand by a non-return valve from the reheater, in particular Reheater inlet, is separated. The flash steam flows from the start-up vessel to the reheater only if the pressure in the start-up vessel exceeds the reheater pressure exceeds a certain value. The whole, or at least most of them The amount of expansion steam thus reaches the turbine condenser directly, so that the hot reheater is no longer cooled down unnecessarily by expansion steam will.
So kann die heiße Turbine ohne Verzug angefahren werden.In this way, the hot turbine can be started up without delay.
Darüber hinaus erspart die Verbindung zur Zwischenüberhitzerleitung mit der in-dieser Verbindungsleitung angeordneten Rückschlaglüppe eine besondere Absicherung des Anfahrgefäßes.In addition, the connection to the reheater line saves with the non-return hatch arranged in this connecting line a special one Protection of the start-up vessel.
Wenn bei zu hohem Druck die Rückschlagklappe öffnet und der Dampf zum Zwischenüberhitzer strömt so kann im Gefahrenfall der Dampf huber dort befindliche Sicherheitsventile abgeleitet werden.If the non-return valve opens when the pressure is too high and the steam flows to the reheater so in the event of danger, the steam can be lifted over there Safety valves are derived.
Im Rahmen der Erfindung kann es von Vorteil sein, eine Regelvorrichtung vorzusehen, die den Druck im Anfahrgefäß aug einer wählbaren Höhe zu halten gestattet. Dabei kann es günstig sein, einen Druckwert einzuhalten, bei dem die überwiegende Menge des Entspannungsdampfes in den Turbinenkondensator strömt, eine bestimmte Teilmenge des Entapannungadampfes jedoch in solcher Dosierung in den Zwiechenüberhitzer gelangt, daß diese Dampfmenge zur Temperaturhaltung des Zwischenüberhitzerdampfes wesentlich beiträgt An Hand der Zeichnung soll die Erfindung näher erläutert werden.In the context of the invention, it can be advantageous to use a control device to be provided that allows the pressure in the start-up vessel to be maintained at a selectable level. It can be beneficial to maintain a pressure value at which the predominant A certain amount of flash steam flows into the turbine condenser Part of the de-tapping steam, however, in such a dosage in the secondary superheater gets that this amount of steam to maintain the temperature of the reheater steam makes a significant contribution The invention will be explained in more detail with the aid of the drawing.
Die Figur zeigt ein Ausführungsbeispiel in seinen für die Erfindung wesentlichen Teilen in stark vereinfachter, schematischer Darstellung.The figure shows an embodiment in its for the invention essential parts in a greatly simplified, schematic representation.
Zwischen den Verdampferheizflächen 1 und dem Überhitzer 2 des Durchlaufdampferzeugers befindet ich eine Hochdruck-Trennvorrichtung 3, von wo aus der Dampf zum Überhitzer weiterströmt, während das abgeschiedene Wasser über ein Regelventil10 zu einem Anfahrgefäß 4 gelangt. Das Regelventil 10 ist bei dem dargestellten Ausführungsbe.ispiel als Ablaufregelventil gezeichnet.Between the evaporator heating surfaces 1 and the superheater 2 of the once-through steam generator I is a high pressure separator 3, from where the steam to the superheater continues to flow, while the separated water flows through a control valve 10 to a start-up vessel 4 arrives. The control valve 10 is in the illustrated Ausführungsbe.beispiel as Drain control valve drawn.
Diesem Ventil kann gegebenenfalls euch ein geeignetes, nicht näher dargestelltes Reduzierventil zugeordnet werden.You may find a suitable, not closer to this valve can be assigned to the reducing valve shown.
Zu Beginn des Warmstartes wird nahezu die gesamte Anfshrwassermenge in der. Hochdruck-Trennvorrichtung 3 abgeschieden und in das Anfahrgefäß 4 geleitet. Im Anfahrgefäß wird dann eine große Entspannungsda-mpfmenge abgeschieden, die jetzt über die Leitung 11 mit dem Regelventil 8 zum Turbinenkondensator 9 geleitet wird.At the beginning of the warm start, almost the entire amount of water is used in the. High-pressure separating device 3 deposited and passed into the start-up vessel 4. In the start-up vessel, a large amount of expansion damping is then deposited, which is now is passed via the line 11 with the control valve 8 to the turbine condenser 9.
Der Dampfraum.des AnfeBrgefäPee 4 steht aber auch über die Leitung 12 mit der Rückechlagarmatur 5 mit der Eingangsleitung 13 des -Zwischenüberhitzere 6 in Verbindung. Durch eine in der Zeichnung nicht näher dargestellte Regelvorrichtung kann der Druck im Anfahrgetäß 4 so geregelt werden, daß er niedriger als der Druck im Zwischenüberhitzer 6 ist, sodaß die Rückschlagklappe 5 geschlossen- bleibt. Sobald jedoch der Druck im Anfahrgefäß 4 den Druck im Zwischenüberhitzer 6 um einen bestimmten Wert übersteigt, öffnet die Rückschagklappe 5 selbsttätig, sodaß der Entspannungedampf durch den Zwischenüberhitzer 6 strömen keton, der durch Sicherheitsventile 7 abgesichert ist.The steam room of the AnfeBrgefäPee 4 is also available via the line 12 with the Rückechlagarmatur 5 with the input line 13 of the intermediate superheater 6 in connection. By a control device not shown in detail in the drawing the pressure in the start-up vessel 4 can be regulated so that it is lower than the pressure is in the reheater 6, so that the non-return valve 5 remains closed. As soon However, the pressure in the start-up vessel 4 increases the pressure in the reheater 6 by a certain amount Exceeds the value, the non-return valve 5 opens automatically, so that the expansion steam Ketone, which is protected by safety valves 7, flows through the reheater 6 is.
Der Druck im Anfahrgefäß s kann so geregelt werden, daß er nsch Möglichkeit unter dem ZiwischeniLberhitzerdruck liegt und die Rückachlagarmatur 5 im Normalzustand geschlossen ist. Man kann aber auch drn Druck so einregeln, daß er um einen bestimmten Betrag den Druck im Zwischenüberhitzer übersteigt, sodaß dann ein Teil des Entspannungsdampfes in den Zwischenüberhitzer 6 strömt und zur Temperaturhaltung des Zwischenüberhitzerdampfes wesentlich beiträgt.The pressure in the start-up vessel can be regulated in such a way that it is possible is below the intermediate superheater pressure and the rear lag armature 5 is closed in the normal state. But you can also regulate the pressure so that it exceeds the pressure in the reheater by a certain amount, so that then part of the flash steam flows into the reheater 6 and to Maintaining the temperature of the reheater steam contributes significantly.
2 Patentansprúche 1 Figur2 claims 1 figure
Claims (2)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691934926 DE1934926A1 (en) | 1969-07-10 | 1969-07-10 | Device for starting and restarting a once-through boiler |
| AT597070A AT304584B (en) | 1969-07-10 | 1970-07-02 | Device for starting and restarting a once-through boiler |
| CH1031470A CH509544A (en) | 1969-07-10 | 1970-07-08 | Device for starting and restarting a once-through boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691934926 DE1934926A1 (en) | 1969-07-10 | 1969-07-10 | Device for starting and restarting a once-through boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1934926A1 true DE1934926A1 (en) | 1971-02-18 |
Family
ID=5739370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691934926 Pending DE1934926A1 (en) | 1969-07-10 | 1969-07-10 | Device for starting and restarting a once-through boiler |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT304584B (en) |
| CH (1) | CH509544A (en) |
| DE (1) | DE1934926A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2758278A1 (en) * | 1977-12-27 | 1979-06-28 | Kraftwerk Union Ag | PROCESS FOR IMPROVING THE PERMITTED LOAD CHANGE RATE OF A CONTINUOUS STEAM GENERATOR |
| DE3221203A1 (en) * | 1981-06-08 | 1983-01-05 | The Babcock & Wilcox Co., 70112 New Orleans, La. | System for setting in operation a steam generator with forced flow |
| DE19736886A1 (en) * | 1997-08-25 | 1999-03-04 | Siemens Ag | Steam generator operating method e.g. for gas-and-steam turbine plant |
| DE102009004173A1 (en) * | 2009-01-09 | 2010-07-15 | Man Turbo Ag | Method for operating steam turbine, involves obtaining partial steam quantity in high pressure part of steam turbine, where partial steam quantity is supplied to low pressure part of steam turbine after isenthalpic relaxation |
-
1969
- 1969-07-10 DE DE19691934926 patent/DE1934926A1/en active Pending
-
1970
- 1970-07-02 AT AT597070A patent/AT304584B/en not_active IP Right Cessation
- 1970-07-08 CH CH1031470A patent/CH509544A/en not_active IP Right Cessation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2758278A1 (en) * | 1977-12-27 | 1979-06-28 | Kraftwerk Union Ag | PROCESS FOR IMPROVING THE PERMITTED LOAD CHANGE RATE OF A CONTINUOUS STEAM GENERATOR |
| DE3221203A1 (en) * | 1981-06-08 | 1983-01-05 | The Babcock & Wilcox Co., 70112 New Orleans, La. | System for setting in operation a steam generator with forced flow |
| DE19736886A1 (en) * | 1997-08-25 | 1999-03-04 | Siemens Ag | Steam generator operating method e.g. for gas-and-steam turbine plant |
| DE19736886C2 (en) * | 1997-08-25 | 2000-05-18 | Siemens Ag | Process for operating a steam generator and steam generator for carrying out the process, and gas and steam turbine system |
| DE102009004173A1 (en) * | 2009-01-09 | 2010-07-15 | Man Turbo Ag | Method for operating steam turbine, involves obtaining partial steam quantity in high pressure part of steam turbine, where partial steam quantity is supplied to low pressure part of steam turbine after isenthalpic relaxation |
| DE102009004173B4 (en) * | 2009-01-09 | 2017-01-05 | Man Diesel & Turbo Se | Steam turbine and method for operating a steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| CH509544A (en) | 1971-06-30 |
| AT304584B (en) | 1973-01-10 |
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