DE3607210C2 - - Google Patents
Info
- Publication number
- DE3607210C2 DE3607210C2 DE19863607210 DE3607210A DE3607210C2 DE 3607210 C2 DE3607210 C2 DE 3607210C2 DE 19863607210 DE19863607210 DE 19863607210 DE 3607210 A DE3607210 A DE 3607210A DE 3607210 C2 DE3607210 C2 DE 3607210C2
- Authority
- DE
- Germany
- Prior art keywords
- steam
- pressure
- feed water
- preheater
- reducing
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/025—Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
Für die NO x -Minderung der Rauchgase müssen bestimmte Mindest temperaturen in der Reduktionsanlage eingehalten werden. Bei fossil befeuerten Dampferzeugern sinkt jedoch im Schwach lastbereich die Rauchgastemperatur unter den erforderlichen Mindestwert.For the NO x reduction of the flue gases, certain minimum temperatures in the reduction system must be observed. With fossil-fired steam generators, however, the flue gas temperature drops below the required minimum value in the low-load range.
Zur Temperaturstützung wurden bisher Maßnahmen vorwiegend im Bereich des Dampferzeugers untersucht und ausgeführt. Die Rauchgastemperatur wird im Schwachlastbereich entweder durch Speisewasserumführung des Eco mit separaten Umwälzpumpen oder rauchgas seitige Umführung des Eco oder Rauchgasrücksaugung oder durch Zu satzbrenner vor der NO x -Minderungsanlage geregelt. Alle Maßnahmen erfordern einen hohen technischen Aufwand und trotzdem können sich anlagespezifische Störungen während des Betriebes er geben.Measures for temperature support have so far been examined and carried out primarily in the area of the steam generator. The flue gas temperature in the low-load range is regulated either by feed water bypassing the Eco with separate circulation pumps or flue gas-side bypassing the Eco or flue gas recirculation or by additional burners in front of the NO x reduction system. All measures require a high level of technical effort and yet system-specific malfunctions can occur during operation.
Der Erfindung liegt die Aufgabe zugrunde, mit möglichst geringem Aufwand eine Rauchgastemperaturstützung bei Schwachlast zu er möglichen. Durch diesen geringeren technischen Aufwand sollen die Investitionskosten verringert und die Verfügbarkeit der Anlage erhöht werden.The invention is based, with as little as possible Effort to support flue gas temperature at low load possible. Due to this lower technical effort reduces investment costs and the availability of Plant can be increased.
Die Aufgabe wird entsprechend Anspruch 1 dadurch gelöst, daß das Speisewasser in einem dampfbeheizten Hochdruckvorwärmer mit Hochdruckdampf über eine Reduzierstation in dem Maße vor gewärmt wird, daß im Economiser die Wärmeaufnahme durch das Rauchgas verringert wird, und somit die Rauchgastemperatur nicht absinkt. Zu diesem Zweck wird eine eigene Dampfreduzier station eingesetzt.The object is achieved according to claim 1 in that the feed water in a steam-heated high-pressure preheater with high pressure steam through a reducing station to the extent is warmed that the heat absorption in the economizer by the Flue gas is reduced, and thus the flue gas temperature does not sink. For this purpose, a separate steam reducer station used.
Die in vielen Anlagen bereits vorhandenen Hochdruckreduzierstationen, auch wie in DE-PS 5 50 827 darge stellt, können für diese Aufgabe aus anlagentechnischen Gründen nicht eingesetzt werden.The ones that already exist in many plants High pressure reducing stations, also as in DE-PS 5 50 827 Darge provides for this task from plant engineering Reasons are not used.
Ein vorteilhafter zusätzlicher Einsatz der Dampfreduzierstation ergibt sich gemäß Anspruch 2 beim Anfahren der Anlage. Durch den frühen Einsatz der regenerativen Speisewasservorwärmung er gibt sich eine Verkürzung der Gesamtanfahrzeit, insbesondere auch durch die bessere Vorwärmung der Hochdruckdampfleitung bis zur Turbine.An advantageous additional use of the steam reducing station arises according to claim 2 when starting the system. By the early use of regenerative feed water preheating there is a reduction in the total approach time, in particular also due to the better preheating of the high pressure steam line to the turbine.
Ein Ausführungsbeispiel der Erfindung wird anhand des Schalt bildes erläutert.An embodiment of the invention is based on the circuit picture explained.
Im Schwachlastbereich wird der Speisewasservorwärmer 4 durch Öffnen des Reduzierventiles 9 von seiner normalen betrieblichen Dampfversorgung getrennt. Durch Öffnen der Station 9 steigt der Druck im Speisewasservorwärmer 4, so daß die Rückschlagklappe 21 selbsttätig schließt. Der Hochdruckdampf wird mit Wasser über das Einspritzventil 10 gekühlt.In the low-load range, the feed water preheater 4 is separated from its normal operational steam supply by opening the reducing valve 9 . By opening the station 9 , the pressure in the feed water preheater 4 increases , so that the non-return valve 21 closes automatically. The high pressure steam is cooled with water via the injection valve 10 .
Durch den dampfseitigen Druckanstieg im Speisewasservorwärmer 4 steigt die Endvorwärmung des Speisewassers vor Eintritt in die Kesselanlage. Dadurch sinkt die Wärmeaufnahme des Economisers 5 und die Rauchgastemperatur am Kesselende und vor der NO x - Minderungsanlage 16 steigt an.Due to the steam-side pressure increase in the feed water preheater 4 , the final preheating of the feed water increases before it enters the boiler system. This reduces the heat absorption of the economizer 5 and the flue gas temperature at the end of the boiler and in front of the NO x reduction system 16 increases.
Durch die Druckanhebung im Speisewasservorwärmer 4 ist es weiter hin möglich, bei Schwachlast der Anlage über eine Entnahme 18 andere Verbraucher zu versorgen, die einen höheren Betriebs druck erfordern, z. B. Ölzerstäuber.By increasing the pressure in the feed water preheater 4 , it is also possible to supply 18 other consumers that require a higher operating pressure, e.g. B. Oil atomizers.
Mit steigender Dampferzeugerleistung fährt die Reduzierstation 9 den Druck im Vorwärmer 4 zurück, bis der Dampfdruck in Leitung 23 höher ist, und die Rückschlagklappe 21 öffnet.With increasing steam generator output, the reducing station 9 lowers the pressure in the preheater 4 until the steam pressure in line 23 is higher and the check valve 21 opens.
Die Reduzierstation 9 kann weiterhin gemäß Anspruch 2 zum schnel leren und verlustärmeren Anfahren der Gesamtanlage eingesetzt werden. Beim Anfahren wird das Kondensat der Hochdruckleitung über die Entwässerungsventile 8 abgeführt. Möglichst unmittel bar vor der Turbine 12 wird der Dampf für die Reduzierstation 9 ent nommen, der das Speisewaser im Vorwärmer 4 beim Anfahren höher vorwärmt. Das Anwärmen der Frischdampfleitung über die Konden sationstemperatur hinaus erfolgt durch die Überhitzungswärme des zur Station 9 strömenden Dampfes wesentlich schneller als bisher.The reducing station 9 can also be used according to claim 2 for quicker and lower-loss start-up of the entire system. When starting up, the condensate of the high pressure line is discharged via the drainage valves 8 . As soon as possible in front of the turbine 12 , the steam for the reducing station 9 is removed, which preheats the feed water higher in the preheater 4 when starting. The warming up of the live steam line above the condensation temperature also takes place much faster than before due to the overheating heat of the steam flowing to station 9 .
Zur Absicherung des Speisewasservorwärmers 4 gegen zu hohen Druck oder zu hohe Temperatur bei Störungen müssen Maßnahmen zum sicheren Schließen der Reduzierstation 9 vorgesehen werden. Außerdem ist der Einbau eines Sicherheitsventiles 20 für Ven tilleckagen der Armatur 9 sinnvoll. To protect the feed water preheater 4 against excessive pressure or excessive temperature in the event of malfunctions, measures must be taken to safely close the reducing station 9 . In addition, the installation of a safety valve 20 for Ven tilleckagen the fitting 9 is useful.
-
Im Schaltbild bedeuten
1 - Niederdruckvorwärmer
2 - Speisewasserbehälter
3, 4 - Hochdruckvorwärmer
5 - rauchgasbeheizter Economiser
6 - Verdampfer
7 - HD-Überhitzer
8 - Entwässerungsventil für Rohrleitungsanwärmung
9 - Dampfreduzierstation
10 - Einspritzwasserventil
11 - Absperrschieber
12 - HD-Turbine
13 - MD-Tubine
14 - ND-Turbine
15 - Kondensator
16 - NO x -Minderungsanlage
17 - Luftvorwärmer
18 - Entnahme für Hilfsdampfverbraucher bei Schwachlast
20 - Sicherheitsventil für Leckage
21 - Rückschlagklappe
22 - Reduzierstation von HD nach ZÜ
23 - kalte Zwischenüberhitzer-LeitungIn the circuit diagram, 1 means low pressure preheater
2 - Feed water tank
3, 4 - high pressure preheater
5 - flue gas heated economiser
6 - evaporator
7 - HD superheater
8 - Drain valve for pipe heating
9 - steam reducing station
10 - Injection water valve
11 - Gate valve
12 - HP turbine
13 - MD tube
14 - LP turbine
15 - capacitor
16 - NO x reduction system
17 - Air preheater
18 - Withdrawal for auxiliary steam consumers at low loads
20 - Leakage safety valve
21 - Check valve
22 - Reduction station from HD to ZÜ
23 - cold reheater line
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863607210 DE3607210A1 (en) | 1986-03-05 | 1986-03-05 | Steam generator with NOx reduction installation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863607210 DE3607210A1 (en) | 1986-03-05 | 1986-03-05 | Steam generator with NOx reduction installation |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3607210A1 DE3607210A1 (en) | 1986-08-28 |
DE3607210C2 true DE3607210C2 (en) | 1988-07-07 |
Family
ID=6295555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863607210 Granted DE3607210A1 (en) | 1986-03-05 | 1986-03-05 | Steam generator with NOx reduction installation |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3607210A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10227709B4 (en) * | 2001-06-25 | 2011-07-21 | Alstom Technology Ltd. | Steam turbine plant and method for its operation |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT403414B (en) * | 1993-06-14 | 1998-02-25 | Vaillant Gmbh | Method for controlling the boiler return temperature |
DE102005034847B4 (en) * | 2005-07-26 | 2016-02-11 | Steag Power Saar Gmbh | Steam power plant |
DE102010041962B3 (en) * | 2010-10-05 | 2012-02-16 | Siemens Aktiengesellschaft | Fossil fired steam generator |
EP3444449A1 (en) * | 2017-08-18 | 2019-02-20 | Siemens Aktiengesellschaft | Installation with bypass station |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE550827C (en) * | 1927-03-16 | 1932-05-24 | Siemens Schuckertwerke Akt Ges | Device for preheating boiler feed water through the evaporation of a counter-pressure machine regulated for output, in particular an in-house turbine |
-
1986
- 1986-03-05 DE DE19863607210 patent/DE3607210A1/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10227709B4 (en) * | 2001-06-25 | 2011-07-21 | Alstom Technology Ltd. | Steam turbine plant and method for its operation |
Also Published As
Publication number | Publication date |
---|---|
DE3607210A1 (en) | 1986-08-28 |
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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 | ||
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: SIEMENS AG, 1000 BERLIN UND 8000 MUENCHEN, DE |
|
8381 | Inventor (new situation) |
Free format text: RIMMELSPACHER, JUERGEN, DIPL.-ING. (FH), 8068 PFAFFENHOFEN, DE |
|
8339 | Ceased/non-payment of the annual fee |