DE3242968C2 - Procedure for regulating the feed water supply to steam generators - Google Patents
Procedure for regulating the feed water supply to steam generatorsInfo
- Publication number
- DE3242968C2 DE3242968C2 DE19823242968 DE3242968A DE3242968C2 DE 3242968 C2 DE3242968 C2 DE 3242968C2 DE 19823242968 DE19823242968 DE 19823242968 DE 3242968 A DE3242968 A DE 3242968A DE 3242968 C2 DE3242968 C2 DE 3242968C2
- Authority
- DE
- Germany
- Prior art keywords
- feed water
- water supply
- regulating
- combustion chamber
- steam generators
- 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
- 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
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
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)
Abstract
Um Dampferzeuger gegen Störungen und Folgeschäden zu schützen, wird ein Verfahren zur Regelung der Speisewasserzufuhr bzw. zur Notabschaltung des Dampferzeugers vorgeschlagen, wobei an mehreren strömungsseitig hintereinanderliegenden Stellen die Wandtemperaturen der Brennkammerrohre gemessen, die Meßwerte mit einem vorgegebenen Temperaturprofil verglichen werden und bei einem Abweichen der Temperaturen von dem vorgegebenen Temperaturprofil die Speisewasserzufuhr verändert bzw. bei Überschreiten vorgegebener Maximaltemperaturen der Dampferzeuger abgeschaltet wird. Ferner werden Wandtemperaturdifferenzen, die ein Maß für die Wärmestromdichte sind, zur Regelung des Speisewassers verwendet, unter Berücksichtigung der Enthalpie des Speisewassers vor bzw. nach dem Economizer.In order to protect steam generators against malfunctions and consequential damage, a method for regulating the feed water supply or for emergency shutdown of the steam generator is proposed, the wall temperatures of the combustion chamber tubes being measured at several points one behind the other on the flow side, the measured values being compared with a predetermined temperature profile and in the event of a deviation in temperatures the feed water supply is changed from the specified temperature profile or the steam generator is switched off when the specified maximum temperatures are exceeded. In addition, wall temperature differences, which are a measure of the heat flow density, are used to regulate the feed water, taking into account the enthalpy of the feed water before and after the economizer.
Description
1515th
Die Erfindung betrifft ein Verfahren zur Regelung der Speisewasserzufuhr zu Dampferzeugern.The invention relates to a method for regulating the feed water supply to steam generators.
Durch die GB-PS 9 26 949 ist ein Verfahren zur Regelung der Speisewasserzufuhr zu Dampferzeugern bekannt geworden. Bei diesem bekannten Verfahren werden an mehreren hintereinander liegenden Stellen die Wandtemperaturen der Brennkammerrohre gemessen, die Meßwerte mit einem vorgegebenen Temperaturprofil verglichen und bei einem Abweichen der Temperaturen von dem vorgegebenen Temperaturprofil die Speisewasserzufuhr entsprechend verändert.From GB-PS 9 26 949 a method for regulating the feed water supply to steam generators is known become. In this known method, the Wall temperatures of the combustion chamber tubes measured, the measured values with a predetermined temperature profile compared and if the temperatures deviate from the specified temperature profile, the Feed water supply changed accordingly.
Bei diesem bekannten Verfahren ist jedoch nachteilig, daß die Temperaturmessungen zu spät erfolgen und sich bei Laststeigerungen im Festdruck- oder gesteuerten Gleitdruckbetrieb infolge der dabei vorübergehend auftretenden Druckabsenkungen und damit verbundenen Temperatur- bzw. Enthalpieabsenkungen für den Speisewasserstrom anfangs sogar ein Signal in verkehrter Richtung ergibt, wodurch der Speisewasserstrom trotz Laststeigerung anfangs vcrniindcfi wird, da scheinbar der Speisewasserstrom zu groß istIn this known method, however, it is disadvantageous that the temperature measurements take place too late and are not with load increases in fixed pressure or controlled sliding pressure operation as a result of the temporary occurrences Pressure drops and associated temperature or enthalpy reductions for the feed water flow initially even gives a signal in the wrong direction, whereby the feed water flow despite Load increase will initially be vcrniindcfi, since apparently the feed water flow is too high
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, bei dem der Speisewasserstrom schnellstmöglich und stets in richtiger Richtung beeinflußt wird.The invention is based on the object of a method to create, in which the feed water flow influences as quickly as possible and always in the right direction will.
Diese Aufgabe wird mit Hilfe der Wärmestromdichte, d. h. der Wärmezufuhr je Zeit- und Flächeneinheit, anstelle der reinen Temperatur dadurch gelöst, daß aus Temperaturdifferenz-Messungen in der Brennkammerwand die Wärmestromdichte an den betreffenden Stellen der Brennkammerwand und daraus die gesamte Wärmeaufnahme aus der Brennkammer ermittelt wird, und daß aus der gesamten Wärmeaufnahme und mit der Enthalpie des Speisewassers vor oder nach dem Economizer der Sollwert für den Speisewasserstrom bestimmt wird.This task is accomplished with the help of the heat flux density, i. H. the heat input per unit of time and area, instead of the pure temperature solved by taking temperature difference measurements in the combustion chamber wall the heat flux density at the relevant points on the combustion chamber wall and, from this, the total Heat absorption from the combustion chamber is determined, and that from the total heat absorption and with the Enthalpy of the feed water before or after the economizer determines the setpoint for the feed water flow will.
Die erfindungsgemäßen Maßnahmen haben gegenüber dem bekannten Stand der Technik den Vorteil, daß auftretende Störungen ohne Zeitverlust erfaßt werden und ihnen rechtzeitig entgegengewirkt werden kann und dadurch die Leistungs- und Dampftemperaturregelung eines Dampferzeugers verbessert und das Risiko eines Schadens am Dampferzeuger weitgehend verringen wird,The measures according to the invention have the advantage over the known prior art that occurring faults can be recorded without loss of time and counteracted in good time and thereby the power and steam temperature control of a steam generator improved and the risk damage to the steam generator will largely be reduced,
6565
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823242968 DE3242968C2 (en) | 1982-11-20 | 1982-11-20 | Procedure for regulating the feed water supply to steam generators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823242968 DE3242968C2 (en) | 1982-11-20 | 1982-11-20 | Procedure for regulating the feed water supply to steam generators |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3242968A1 DE3242968A1 (en) | 1984-01-12 |
| DE3242968C2 true DE3242968C2 (en) | 1985-11-14 |
Family
ID=6178587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19823242968 Expired DE3242968C2 (en) | 1982-11-20 | 1982-11-20 | Procedure for regulating the feed water supply to steam generators |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3242968C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK0439765T3 (en) * | 1990-01-31 | 1995-10-02 | Siemens Ag | A steam generator |
| EP0639253B1 (en) * | 1992-05-04 | 1996-12-11 | Siemens Aktiengesellschaft | Forced-flow steam generator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH382761A (en) * | 1961-02-15 | 1964-10-15 | Sulzer Ag | Method and arrangement for regulating a once-through steam generator |
-
1982
- 1982-11-20 DE DE19823242968 patent/DE3242968C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3242968A1 (en) | 1984-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: LEITHNER, REINHARD, PROF. DR.TECHN., 3300 BRAUNSCH |
|
| 8339 | Ceased/non-payment of the annual fee |