DE897251C - Steam turbine for operation with reheating - Google Patents

Steam turbine for operation with reheating

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Publication number
DE897251C
DE897251C DER616A DER0000616A DE897251C DE 897251 C DE897251 C DE 897251C DE R616 A DER616 A DE R616A DE R0000616 A DER0000616 A DE R0000616A DE 897251 C DE897251 C DE 897251C
Authority
DE
Germany
Prior art keywords
steam
valves
control
reheating
turbine
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
Application number
DER616A
Other languages
German (de)
Inventor
Karl Dr-Ing Roeder
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Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DER616A priority Critical patent/DE897251C/en
Application granted granted Critical
Publication of DE897251C publication Critical patent/DE897251C/en
Expired legal-status Critical Current

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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Description

DieVerwendung der Zwischenüberhitzung bringt in Dampfkraftwerken eine Reihe von Vorteilen; wie die Ersparnis an: Brennstoff bei, gegebener Frischclampftemperatur durch Annäherung an die isotherme Entspannung. Durch die Verminderung bzw. Vermeidung der Dampffeuchtigkeit in den Niederdruckkränzen erhöht sich auch die Lebensdauer der Niedendruckschaufeln. Für die bei Betrieb mit Zwischenüberhitzung vorliegende Treue Auf,- b#, die Strömung ^dies_ Damfes aussdem Zwi: _chenü_#erhi_tz die Turbine bei starkem Lastabfall.bis auf kleine Leistüngen,äder auf Leerlauf durch zusätzliche Organe und die Regler so zu beherrschen, daß die Drehzahl _Kehalten wird, ohne daß der Sicherheitsreglers ausschlägt und die Turbine abstellt, sind eine Reihe von Vorschlägen bekannt.The use of reheating in steam power plants brings a number of advantages; like the savings on: fuel at a given fresh clamp temperature by approaching the isothermal expansion. By reducing or avoiding the steam moisture in the low-pressure rings, the service life of the low-pressure blades is also increased. For the loyalty Auf, - b #, which exists during operation with reheating, the flow ^ dies_ Damfes aus dem Zwi: _chenü_ # heats the turbine in the event of a strong load drop A number of proposals are known to keep the speed low without the safety governor deflecting and the turbine being switched off.

Es wird nun vorgeschlagen, dien Betrieb ider mit-Zwsch.enüberhitzern zusammenarbeitenden Turbinen dadurch, auf die gleiche 'Zuverlässigkeit zu bringen wie bei Turbinen, ohne Zwis:chenüberhitzer, daß der Schaufelteil, dem der Dampf aus dem Zwischenübenhitzer zuströmt, eine Regelstufe aufweist, die in besondenerWeise beherrscht wird. Der Drehzahlregler betätigt nurr die zu Leerlauf und Kleinlast gehörigen Regelventile in konstantem Verhältnis ihres öffnungsquerschnittes- zu denjenigen der zugehörigen: Fri:s,chdiampf'rege@lventile, während, er die übrigen: Regelvemtiile entweder ganz öffnet oder ganz schließt. Dadürch beschränken sich die Drosselverluste auf die selten auftretendem Leistungen in der Nähe des Leerlaufs, wohingegen diie Drehzahl auch bei. plötzlichen Entlastungen sicher beherrscht und, darüber hinausgehend noch die Wirkung erzielt wird, daß der überhitzen gegen schädliche Druckschwankungen weitgehend gesichert ist. -Im Zwischenüberhitzer werden, ohne .daß der Sicherheitsregler der Turbine seine die Turbine abstellende Wirkung bei @diesem Übergang ausübt, zuverlässig durch. die Bemessung der Düsensätze der Regelstufe, ihrer Regelorgane und deren Antrieb Drücke aufrechterhalten, die für die Lebensdauer des,Überhitzers und für denProzeßwirkungsgrad am vorteilhaftesten sind. Diese zweite Regelstufe verkürzt auch die Turbine .und setzt die Temperatur im. Gehäuse herab-, Es kann. so vorgegangen wenden, daß jedes der Düsenventile ,der Frischdampfregelstufe ein Düsenventil für die gleiche Dampfmenge der zweiten Regelstufe in seiner Bewegung beherrscht und dun ch die Ausbilidung der Düsensätze und der wirksamen Ventilquerschnitte der gewünschte Einfloß auf die Drücke im Zwischenüberh @itzer aus.geiibt wird, der auch für sicheren Betrieb und - lange Le@bens,dawer dies. Zwis chenüberhitzers erforderlich ist. Damit schädliche Drosselverluste vor dem Wiedereintritt des Dampfes vermieden werden, wird der Geschwindigkeitsregler nur die bei Leerlauf und geringer Last arbeitenden Düsenventile der zweiten Regelstufe in. allen Zwischenstellungen beherrschen, während er die übrigen Düsenventile der zweiten Regelstufe, die mit kurzem oder ohne Drosselkragen ausgestattet werden, nur von einer in -die andere iEndlage überführt. Drosselverluste beschränken sich dann auf die s@elt@n.-äüftrebenden. Lei @eri in rler @äl_he ödes Leerlaufes, dessen Drel zähl jedäch ä.udh bei"-plötzlich,en Entlastungen s l@eberrscht wird-.It is now proposed to operate with intermediate superheaters cooperating turbines by bringing them to the same 'reliability as in the case of turbines, without intermediate superheaters, that is, the part of the blade that the steam flows in from the reheater, has a control stage, which in a special way is controlled. The speed controller operates only for idling and low fire associated control valves in a constant ratio of their opening cross-section to those of the associated: Fri: s, chdiampf'rege @ lventile, while, he the remaining: Control valve either fully opens or fully closes. Therefore limit yourself the throttling losses on the rarely occurring performances in the vicinity of the idle, whereas the speed also at. Sudden relief safely mastered and, in addition, the effect is achieved that the overheat against harmful Pressure fluctuations is largely secured. -Be in reheater without .that the turbine safety regulator has its turbine shutdown effect @ this transition, reliably through. the dimensioning of the nozzle sets of the control stage, their regulating organs and their drive maintain pressures that are sufficient for the service life des, superheaters and are most beneficial for process efficiency. This second The control stage also shortens the turbine and sets the temperature in the. Housing down, It can. proceed in such a way that each of the nozzle valves, the live steam control stage a nozzle valve for the same amount of steam of the second control stage in its movement masters and dun ch the formation of the nozzle sets and the effective valve cross-sections the desired influence on the pressures in the reheater is given also for safe operation and a long life. Intermediate superheater required is. This avoids damaging throttling losses before the steam re-enters the cruise control will only operate at idle and light load Nozzle valves of the second control stage in all intermediate positions, while the other nozzle valves of the second control stage, those with a short or without a throttle collar can only be transferred from one end position to the other. Throttling losses are then limited to the s @ elt @ n.-äüftrebenden. Lei @eri in rler @ äl_he ödes Idle, whose drel counts each other a.udh with "-suddenly, the relief s l @ eberrscht will-.

" Im Äüsfüh:rungsbeispiel ist a die Frischdampfregelstufe, die das Treibmittel aus dem Kessel b und dem Überhitzer c entnimmt. In der Schaufelung d wird es surf dien Druck im Zwischenüberhitzer e weiter entspannt und gelangt dann in die weitere Regelstufe f. Gemäß der Erfindung arbeitet die RegeleinricJhtu#ng g der Stufe f in der beschriebenen Weise- mit der entsprechenden Einrichtung h der Frischdampfreelstufe a zusammen. Die Entspannung setzt sich in: den Schaufelgruppen i und k und: nm Niedend;rucktei.l m fort."In the example, a is the live steam control stage that Removes propellant from the boiler b and the superheater c. In the scoop d If the pressure in the reheater e is further relaxed and then it arrives into the further control stage f. According to the invention, the control device works g of stage f in the manner described - with the corresponding device h of Main steam level a together. The relaxation is in: the shovel groups i and k and: nm Niedend; jerktei.l m forward.

Claims (5)

PATENTANSPRUCH: Dampfturbine für Betrieb mit Zwischenüberhitzung, die zwilschen dem Owischenüberhitzer und,der diesem folgenden Schaufelgruppe eine vom Drehzahlregler betätigte RegeleinrüicJhtung besitzt, welche mit den vor der ersten Turbinenstufe befindlichen Frischdampfregelventilen zwangsläufig so verbunden ist, daß sie in gleichem Sinne wie diese regelt, dadurch gekennzeichnet, daß bei: dieser in an sich bekannter Weise aus den Düsenventilen einer Regelstufe bestehenden Regeleinrichtung der Drehzahlregler nur die zu Leerlauf und, Kleinlast gehörigen Regelventile in konstantem Verhältnis ihres öffnungsquersdhnittes zu denjenigen der zugehörigen Frischdampfventile betätigt, @die. übrigen. PATENT CLAIM: Steam turbine for operation with reheating, those between the Owischen superheater and the one following the blade group has the control device operated by the speed controller, which is compatible with the first turbine stage located live steam control valves inevitably so connected is that it regulates in the same way as this, characterized in that: this existing in a manner known per se from the nozzle valves of a control stage Control device of the speed controller only belonging to idle and low fire Control valves in a constant ratio of their opening cross-section to those the associated main steam valves operated, @the. rest. Regelventile dagegen entweder ganz öffnet oder ganz schließt. Control valves on the other hand either fully opens or fully closes. Angezogene Druckschriften: Deutsche Patentschriften: Nr. 47:Referred publications: German patents: No. 47: 4 Zro" 526 q"63; Denninger, »D"ampfturbinen-Regelung«, 1934, S. II (Abb.4), 53, 88; Sto-dola, »Dampf- und Gasturbinen«, 4 Zro " 526 q"63; Denninger, "D" ampfturbinen-Regel ", 1934, p. II (Fig. 4), 53, 88; Stodola," Steam and Gas Turbines ", 5. Aufl., S.688 und 699; Stein, »Regelung und Ausgleich in Dampfkraftanlagen«, 1936, S.27.5th ed., Pp. 688 and 699; Stein, "Regulation and Compensation in Steam Power Plants ", 1936, p.27.
DER616A 1949-12-22 1949-12-22 Steam turbine for operation with reheating Expired DE897251C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER616A DE897251C (en) 1949-12-22 1949-12-22 Steam turbine for operation with reheating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER616A DE897251C (en) 1949-12-22 1949-12-22 Steam turbine for operation with reheating

Publications (1)

Publication Number Publication Date
DE897251C true DE897251C (en) 1953-11-19

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959281C (en) * 1954-03-23 1957-03-07 Eisen & Stahlind Ag Retractable switch, especially for open-cast mining
DE1024525B (en) * 1954-05-11 1958-02-20 Escher Wyss Gmbh Control device on a steam turbine group with intermediate superheating of the working steam
DE1036866B (en) * 1954-01-27 1958-08-21 Licentia Gmbh Control device for steam turbines with reheating
DE976520C (en) * 1951-03-09 1963-12-12 Siemens Ag Control device for a steam turbine working with reheating

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE474210C (en) * 1923-10-31 1929-03-28 Schmidt Sche Heissdampf Ges M Device for securing multi-stage steam turbines for high-pressure steam and with intermediate overheating against exceeding the permissible number of revolutions
DE526463C (en) * 1926-11-10 1931-06-06 Bbc Brown Boveri & Cie Process for the regulation of series-connected normal pressure turbines operated only by high pressure steam with upstream turbines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE474210C (en) * 1923-10-31 1929-03-28 Schmidt Sche Heissdampf Ges M Device for securing multi-stage steam turbines for high-pressure steam and with intermediate overheating against exceeding the permissible number of revolutions
DE526463C (en) * 1926-11-10 1931-06-06 Bbc Brown Boveri & Cie Process for the regulation of series-connected normal pressure turbines operated only by high pressure steam with upstream turbines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976520C (en) * 1951-03-09 1963-12-12 Siemens Ag Control device for a steam turbine working with reheating
DE1036866B (en) * 1954-01-27 1958-08-21 Licentia Gmbh Control device for steam turbines with reheating
DE959281C (en) * 1954-03-23 1957-03-07 Eisen & Stahlind Ag Retractable switch, especially for open-cast mining
DE1024525B (en) * 1954-05-11 1958-02-20 Escher Wyss Gmbh Control device on a steam turbine group with intermediate superheating of the working steam

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