DE1751761B2 - PROCEDURE FOR SUB-CRITICAL OPERATION OF A FORCED STEAM GENERATOR WITH WORK MEDIA RECIRCULATION - Google Patents
PROCEDURE FOR SUB-CRITICAL OPERATION OF A FORCED STEAM GENERATOR WITH WORK MEDIA RECIRCULATIONInfo
- Publication number
- DE1751761B2 DE1751761B2 DE19681751761 DE1751761A DE1751761B2 DE 1751761 B2 DE1751761 B2 DE 1751761B2 DE 19681751761 DE19681751761 DE 19681751761 DE 1751761 A DE1751761 A DE 1751761A DE 1751761 B2 DE1751761 B2 DE 1751761B2
- Authority
- DE
- Germany
- Prior art keywords
- steam
- evaporator
- combustion chamber
- steam generator
- pipes
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B29/00—Steam boilers of forced-flow type
- F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
- F22B29/12—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes operating with superimposed recirculation during starting and low-load periods, e.g. composite boilers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Description
den Wasservorwärmer 2 gefördert. Nach Durchströmen des Wasservorwärmers 2 gelangt das nunmehr vorgewärmte Speisewasser in das Mischgefäß 3. Von hier aus wird es mit Hilfe der Rückführpumpe 4 dem Eintritt 5 des Verdampfers 6 zugeführt.the water preheater 2 promoted. After flowing through the water preheater 2, this happens now preheated feed water into the mixing vessel 3. From here it is with the help of the return pump 4 dem Inlet 5 of the evaporator 6 is supplied.
Beim Betrieb des Dampferzeugers im unteren und minieren Lastbereich strömt das Dampf-Wasser-Gemisch dem Wasserabscheider 8 zu. Dort findet eine Trennung von Wasser und Dampf statt. Das abgeschiedene Überschußwasser gelangt durch die Leitung 9 ebenfalls zum Mischgefäß 3 und wird gemeinsam mit dem Speisewasser dem Verdampfereintritt 5 zugeführt. Der Dampf gelangt über die Zuführungsleitung 10 zum Überhitzer 11, wird dort auf die gewünschte Temperatur überhitzt und strömt anschließend zur nicht dargestellten Turbine ab.When the steam generator is operated in the lower and lower load range, the steam-water mixture flows the water separator 8 to. There is a separation of water and steam. The secluded Excess water also reaches the mixing vessel 3 through line 9 and becomes common supplied to the evaporator inlet 5 with the feed water. The steam arrives via the supply line 10 to the superheater 11, is there superheated to the desired temperature and then flows to the turbine, not shown.
Beim Betrieb des Dampferzeugers im oberen Lastbereich wird ein Teilstrom des erzeugten Dampfes durch die Abzweigleitung 12 zvm Mischgefäß 3 geführt. Die dem Mischgefäß zugeführte Dampimenge wird durch das Regelventil 13 entsprechend dem Bedarf an umzuwälzendem Wasser geregelt. Eine Grenze für die rückgeführte Dampfmenge wird durcL die Gemischtemperatur im Mischgefäß 3 gebildet, die etwa 10 bis 2O0C unterhalb der Sattdampftemperatur gehalten wird.When operating the steam generator in the upper load range, a partial flow of the generated steam is passed through the branch line 12 to the mixing vessel 3. The amount of steam supplied to the mixing vessel is regulated by the regulating valve 13 in accordance with the demand for water to be circulated. A limit to the amount of recirculated steam is formed, the mixture temperature in the mixing vessel 3 durcL which is kept about 10 to 2O 0 C below the saturated steam temperature.
Unabhängig von der Fahrweise des Dampferzeugers wird ständig eine als Sperre gegen Rückströmen von Wasser aus dem Mischgefäß 3 dienende Dampfmenge vom Verdampfera.istntt7 in das Mischgefaß gcleket. Im übrigen wird das Rücksiromen von Wasser aus dem Mischgefaß 3 in den Wasserabscheider 8 noch durch das in die Abzweigleitung 12 eingebaute Rückschlagventil 14 verhindert. Regardless of the mode of operation of the steam generator, an amount of steam serving as a barrier against backflow of water from the mixing vessel 3 is constantly gcleket from the evaporator into the mixing vessel. In addition, the back flow of water from the mixing vessel 3 into the water separator 8 is prevented by the non-return valve 14 built into the branch line 12.
Zur Erläuterung der Anwendbarken der crfmdungsgemäßen Schaltung des yerdampfersysiems bzw des Betriebsverfahrens ist folgendes konkrete Beispiel erwähnt.To explain the applicability of the relevant The circuit of the yerdampfersysiems or the operating procedure is the following Example mentioned.
ίο Ausgegangen wird von einem Dampferzeuger von etwa 200 atü Druck am Verdampferausintt. Be. einer Belastung von 100»o bis etwa 75 "„ wird im Verdampfer Dampf mit einer Temperatur von 380 bis 390 C erzeugt, bei einer Sattdampftemperaturίο It is assumed that there is a steam generator from about 200 atmospheres pressure on the evaporator outlet. Be. a load of 100 »o to about 75" "will be im Evaporator generates steam with a temperature of 380 to 390 C, at a saturated steam temperature
u von etwa 365° c\ind einer Speisewassertemperatur von 260= C Innerhalb dieses Lastbereiches wird eine Teilmenge des erzeugten Dampfes in das Mischgefaß geführt. Die Temperaturdifferenz zwischen vorgewärmtem Speisewasser und ruckgefuhrtem u of around 365 ° C \ ind a feed water temperature of 260 = C Within this load range, a portion of the generated steam is fed into the mixing vessel . The temperature difference between preheated feed water and returned
ao Dampf erlaubt die Kondensation von etwa 30 Vt des erzeugten Dampfes, ohne den Sicherheitsabstand zur SattdLpftemperatur im Mischgefaß zu unterschreiten. Demzufolge kann der Dampferzeuger mit l,3facher Umwälzung im Verdampfer betneben werden. Ao steam allows the condensation of about 30 Vt of the generated steam without falling below the safety margin to the saturated temperature in the mixing vessel. As a result, the steam generator can be operated with 1.3-fold circulation in the evaporator.
« Gleichgültig ob der Dampferzeuger im Gleitdruck- oder Festdruckbetrieb gefahren wird, ergeben sich die Betriebsmöglichkeiten des Dampferzeugers bei gesicherter Stabilität des Durchflusses des Arbeitsmittels durch den Verdampfer.«Regardless of whether the steam generator is in sliding pressure or fixed pressure operation, the result is Operating possibilities of the steam generator with guaranteed stability of the flow of the working medium through the evaporator.
Claims (1)
rückführung im oberen Lasibereich zum Ver- io Daher wurde parallel zu der vorbeschriebenen dämpfer über ein Mischgefäß, in das das Speise- Bauart ein Systen. entwickelt ('Mitteilungen der Verwasser eingespeist wird, dadurch gekenn- einigung der Großkesselbetreiber. Juni 1968. zeichnet, daß im oberen Lastbereich bei S. 174ff), das die geschilderten Nachteile beseitigt. Überschreiten der Sattdampftemperatur am Ver- Bei diesen Dampferzeugern werden alle BrennuampU'iaustnu (7) eine Teilmenge des den Ver- 15 kammerrohre wieder lotrecht angeordnet. Eine für dampf;·1 ;6) verlassenden Dampfes über eine mit die Kühlung der Biennkammerrotare ausreichende Regd- und Absperreinrichtungen (13. 14) verse- Arbeitsmittelmenge wird dadui-h gewonnen, daß her.e. Jen Abscheider (8) umgehende BypaSlei- dem Arbeitsmitteldurchlauf ein Arbeitsmittelumlauf tune (12) dem Mischgefäß (3) zugeführt, dort überlagert wird (Wasserrückführung). kondensiert und gemeinsam mit dem Speisewas- an Nachteilig ist jedoch bei diesen Dampferzeugern, ser eiern Verdampfereintritt (5) zugeführt wird. daß die aus den Brennkammerrohren gebildete Ver Method for the subcritical operation of a constructionally and technically very complex. Forced once-through steam generator «·, the combustion of which, especially in the case of lignite-fired steam chambers, has vertical, parallel working fluid sides. in which, for example, the individual lelgescnaheien pipes are lined. With the burner corners, reach a height of about 18 Meiers between the evaporator and the superheater. it is extremely difficult to lead the pipes around the orderly water separator and work equipment - the necessary openings.
Return in the upper Lasi area to the Verio. Therefore, parallel to the steamer described above, a mixing vessel was used in which the food design a system. developed ('notifications of the waterers fed in, thereby identifying the large boiler operator. June 1968. shows that in the upper load range at p. 174ff), which eliminates the disadvantages described. Exceeding the saturated steam temperature at the tube. With these steam generators, all of the BrennuampU'iaustnu (7) a subset of the chamber tubes are again arranged vertically. One for steam · 1; leaving 6) steam with a cooling of the Biennkammerrotare sufficient Regd- and shut-off devices (13, 14) verse- working medium quantity is obtained Dadui-h that her.e. The separator (8) bypasses the working medium flow and a working medium circulation tune (12) is fed to the mixing vessel (3), where it is superimposed (water return). condensed and together with the feed water , however, the disadvantage of these steam generators is that they are fed to an evaporator inlet (5). that the Ver formed from the combustion chamber tubes
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681751761 DE1751761B2 (en) | 1968-07-25 | 1968-07-25 | PROCEDURE FOR SUB-CRITICAL OPERATION OF A FORCED STEAM GENERATOR WITH WORK MEDIA RECIRCULATION |
NL6910880A NL6910880A (en) | 1968-07-25 | 1969-07-15 | |
CH1084769A CH511398A (en) | 1968-07-25 | 1969-07-16 | Method for operating a forced steam generator with working medium return and steam generator for performing the method |
SE10345/69A SE343670B (en) | 1968-07-25 | 1969-07-22 | |
ES369796A ES369796A1 (en) | 1968-07-25 | 1969-07-23 | Apparatus and method for recirculating working medium in a forced flow steam generator |
US844576A US3592170A (en) | 1968-07-25 | 1969-07-24 | Apparatus and method for recirculating working medium in a forced flow steam generator |
FR6925355A FR2013700A1 (en) | 1968-07-25 | 1969-07-24 | |
BE736610D BE736610A (en) | 1968-07-25 | 1969-07-25 | |
GB37583/69A GB1280234A (en) | 1968-07-25 | 1969-07-25 | Improvements in and relating to forced flow steam generators with working fluid re-circulation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681751761 DE1751761B2 (en) | 1968-07-25 | 1968-07-25 | PROCEDURE FOR SUB-CRITICAL OPERATION OF A FORCED STEAM GENERATOR WITH WORK MEDIA RECIRCULATION |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1751761A1 DE1751761A1 (en) | 1971-11-18 |
DE1751761B2 true DE1751761B2 (en) | 1973-09-06 |
Family
ID=5692456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19681751761 Ceased DE1751761B2 (en) | 1968-07-25 | 1968-07-25 | PROCEDURE FOR SUB-CRITICAL OPERATION OF A FORCED STEAM GENERATOR WITH WORK MEDIA RECIRCULATION |
Country Status (9)
Country | Link |
---|---|
US (1) | US3592170A (en) |
BE (1) | BE736610A (en) |
CH (1) | CH511398A (en) |
DE (1) | DE1751761B2 (en) |
ES (1) | ES369796A1 (en) |
FR (1) | FR2013700A1 (en) |
GB (1) | GB1280234A (en) |
NL (1) | NL6910880A (en) |
SE (1) | SE343670B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH517266A (en) * | 1969-12-24 | 1971-12-31 | Sulzer Ag | Method for sliding pressure operation of a forced-flow steam generator and forced-flow steam generator system for carrying out the method |
CH559941A5 (en) * | 1972-12-20 | 1975-03-14 | Sulzer Ag | |
EP1710498A1 (en) * | 2005-04-05 | 2006-10-11 | Siemens Aktiengesellschaft | Steam generator |
EP2065641A3 (en) * | 2007-11-28 | 2010-06-09 | Siemens Aktiengesellschaft | Method for operating a continuous flow steam generator and once-through steam generator |
EP3048366A1 (en) * | 2015-01-23 | 2016-07-27 | Siemens Aktiengesellschaft | Waste heat steam generator |
US10345028B2 (en) * | 2016-06-17 | 2019-07-09 | Panasonic Intellectual Property Management Co., Ltd. | Evaporators, methods for defrosting an evaporator, and cooling apparatuses using the evaporator |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE564616A (en) * | 1957-02-07 | |||
DE1551057A1 (en) * | 1966-03-05 | 1970-01-15 | Steinmueller Gmbh L & C | Method and device for dry start-up and shutdown of forced flow boilers |
-
1968
- 1968-07-25 DE DE19681751761 patent/DE1751761B2/en not_active Ceased
-
1969
- 1969-07-15 NL NL6910880A patent/NL6910880A/xx unknown
- 1969-07-16 CH CH1084769A patent/CH511398A/en unknown
- 1969-07-22 SE SE10345/69A patent/SE343670B/xx unknown
- 1969-07-23 ES ES369796A patent/ES369796A1/en not_active Expired
- 1969-07-24 FR FR6925355A patent/FR2013700A1/fr not_active Withdrawn
- 1969-07-24 US US844576A patent/US3592170A/en not_active Expired - Lifetime
- 1969-07-25 GB GB37583/69A patent/GB1280234A/en not_active Expired
- 1969-07-25 BE BE736610D patent/BE736610A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES369796A1 (en) | 1971-07-16 |
DE1751761A1 (en) | 1971-11-18 |
FR2013700A1 (en) | 1970-04-03 |
GB1280234A (en) | 1972-07-05 |
CH511398A (en) | 1971-08-15 |
BE736610A (en) | 1970-01-26 |
SE343670B (en) | 1972-03-13 |
NL6910880A (en) | 1970-01-27 |
US3592170A (en) | 1971-07-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0054601B2 (en) | Forced-circulation steam boiler | |
EP0308728A1 (en) | Method of operating a once-through steam generator | |
DE1751761B2 (en) | PROCEDURE FOR SUB-CRITICAL OPERATION OF A FORCED STEAM GENERATOR WITH WORK MEDIA RECIRCULATION | |
DE2102024A1 (en) | Steam generator | |
EP0199251A1 (en) | Waste heat steam generator | |
DE2101563A1 (en) | Process for controlling the hot steam temperature in radiant steam generators | |
CH688837A5 (en) | Steam generator. | |
DE1601788A1 (en) | Circulation arrangement for a steam generator | |
DE1225199B (en) | Heat transfer system of a nuclear reactor plant with a forced circulation heat transfer | |
DE2621340A1 (en) | HEAT STEAM GENERATOR | |
DE2006409B2 (en) | FORCED-ROTATION STEAM GENERATOR SUITABLE FOR SLIP PRESSURE OPERATION | |
EP0084846A1 (en) | Heat exchanger for operating a boiler installation for superheated steam | |
DE2916345A1 (en) | System for part-load control of fluidised bed furnaces - varies bed material, as well as fuel and air quantity and quality | |
CH643646A5 (en) | STEAM GENERATOR FOR TWO FUELS OF DIFFERENT FLAME RADIATION. | |
DE506842C (en) | High pressure steam power plant | |
DE1997328U (en) | FORCED FLOW STEAM GENERATOR WITH WATER RECIRCULATION. | |
DE809686C (en) | Method for eliminating harmful gas water occurring in gas generation plants by evaporating the same by means of the steam generated in the steam jacket of a gas generator and introducing the gas water vapor into the gas generator | |
DE818646C (en) | Water tube ship boiler | |
DE945882C (en) | Method and device for regulating the temperature of gases and vapors, especially in air heaters for aerodynamic turbines | |
AT127915B (en) | Steam generating plant. | |
AT229336B (en) | Converter waste heat boiler | |
DE1263783B (en) | Procedure for commissioning once-through boilers | |
DE2132454B2 (en) | Large steam generator to be operated with pulverized coal combustion | |
DE1815969A1 (en) | Supercritical pressure steam generator with a recirculation loop | |
DE432204C (en) | Process for generating steam, especially for very high pressures |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
BHV | Refusal |