DE1236711B - Arrangement to protect a regenerative air preheater and the fresh air fan of an oil-fired steam generator against acid corrosion - Google Patents
Arrangement to protect a regenerative air preheater and the fresh air fan of an oil-fired steam generator against acid corrosionInfo
- Publication number
- DE1236711B DE1236711B DE1962W0031758 DEW0031758A DE1236711B DE 1236711 B DE1236711 B DE 1236711B DE 1962W0031758 DE1962W0031758 DE 1962W0031758 DE W0031758 A DEW0031758 A DE W0031758A DE 1236711 B DE1236711 B DE 1236711B
- Authority
- DE
- Germany
- Prior art keywords
- fresh air
- air
- oil
- arrangement
- steam generator
- 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
- 230000001172 regenerating effect Effects 0.000 title claims description 7
- 230000007797 corrosion Effects 0.000 title claims description 5
- 238000005260 corrosion Methods 0.000 title claims description 5
- 239000002253 acid Substances 0.000 title claims description 3
- 239000003546 flue gas Substances 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- XOCUXOWLYLLJLV-UHFFFAOYSA-N [O].[S] Chemical class [O].[S] XOCUXOWLYLLJLV-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
- F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
- F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Description
Anordnung zum Schutze eines Regenerativ-Luftvorwärmers und des Frischluftaebläses eines ölgefeuerten Dampferzeugers gegen Säurekorrosion Zur Vermeidung einer Taupunktunterschreitung an den rauchgasberührten Heizflächen von fest angeordneten Luftvorwärmern ist es im Dampfkesselbau bekannt, einen Teil der vorgewärmten Verbrennungsluft dem vom Lüfter angesaugten Frischluftstrom beizumischen (Energietechnik, 3. Jahrgang, H. 10, Oktober 1953, S. 460 bis 462).Arrangement to protect a regenerative air preheater and the fresh air blower of an oil-fired steam generator against acid corrosion To avoid falling below the dew point it is on the heating surfaces of fixed air preheaters that come into contact with the flue gas known in steam boiler construction, part of the preheated combustion air is transferred from the Fan to mix in the fresh air flow sucked in (energy technology, 3rd year, H. 10, October 1953, pp. 460 to 462).
Bei Regenerativ-Luftvorwärmern ist es ebenfalls bekannt, zur Vermeidung einer Kondensatbildung im Luftvorwärmer dessen Metallmassen durch einen Umluftstrom von erhöhter Temperatur vorzuwärmen, insbesondere vor dem Anfahren des Dampferzeugers (USA.-Patentschrift 2 809 811).It is also known to prevent regenerative air preheaters a condensate formation in the air preheater its metal masses by a circulating air flow preheat from an elevated temperature, especially before starting up the steam generator (U.S. Patent 2,809,811).
Bei ölgefeuerten Dampferzeugern liegt der Taupunkt wegen der Bildung von Schwefel-Sauerstoff-Verbindungen hoher Aggressivität relativ hoch, etwa zwischen 130 und 160° C. Es ist bereits bekannt, auch bei Dampferzeugern mit umlaufenden Luftvorwärmern einen Teil der im Luvo bereits erhitzten Luft dem vom Frischluftgebläse angesaugten Kaltluftstrom beizumischen.In the case of oil-fired steam generators, the dew point is due to the formation of sulfur-oxygen compounds of high aggressiveness relatively high, for example between 130 and 160 ° C. It is already known, even with steam generators with rotating Air preheaters a part of the air already heated in the Luvo that of the fresh air blower to mix in the cold air flow that has been drawn in.
Diese an sich einfache Lösung hat bei ölgefeuerten Dampferzeugern mit umlaufendem Luftvorwärmer den Nachteil, daß infolge der unvermeidlichen Vermischung von Rauchgasen und Frischluft im umlaufenden Luftvonvärmer die Umluft korrosive Bestandteile aufnimmt, die im Frischluftgebläse infolge Taupunktunterschreitung Anfressungen an den Schaufeln herbeiführen.This solution, which is simple in itself, is found in oil-fired steam generators with circulating air preheater the disadvantage that due to the inevitable mixing of flue gases and fresh air in the circulating air heater, the circulating air is corrosive Absorbs components in the fresh air blower as a result of falling below the dew point Create pitting on the blades.
Aufgabe der Erfindung ist es, diesen Übelstand zu vermeiden. Sie besteht darin, einen Teil der vom Frischluftgebläse gelieferten Reinluft vor ihrem Eintritt in den Regenerativ-Luftvorwärmer einem im Rauchgasstrom liegenden Röhrenlufterhitzer zuzuführen und die erwärmte Luft in die Ansaugeleitung des Frischluftgebläses zurückzuleiten.The object of the invention is to avoid this drawback. she consists in it, part of the clean air supplied by the fresh air blower before it enters in the regenerative air preheater a tubular air heater located in the flue gas flow and feed the heated air back into the intake line of the fresh air blower.
Auf diese Weise können keine Rauchgasbeimengungen in das Gebläse gelangen, das nur reine Frischluft, bestehend aus einem vorgewärmten und einem nicht vorgewärmten Teil ansaugt.In this way no flue gas can get into the fan, the only pure fresh air, consisting of one preheated and one not preheated Part sucks.
Die Zeichnung stellt eine Anordnung gemäß der Erfindung vereinfacht dar.The drawing shows an arrangement according to the invention in a simplified manner represent.
Der übliche umlaufende Regenerativvorwärmer, Drehluvo 1 wird in Richtung des Pfeiles 2 von den heißen Rauchgasen und in Richtung des Pfeiles 3 von der aufzuwärmenden Frischluft durchströmt. Vor dem Drehluvo 1 in Richtung des Rauchgasstromes 2 gesehen, ist gemäß der Erfindung der Röhren-Luftvorwärmer 4 angeordnet, dem ein Teil des vom Gebläse 5 gelieferten kalten Luftstromes zugeführt wird. Dieser Teilluftstrom wird nach erfolgter Aufwärmung im Röhren-Luftvorwärmer 4 in die Ansaugeleitung 6 des Gebläses 5 eingeleitet, wodurch die dem umlaufenden Luftvorwärmer 1 zugeführte Kaltluft genügend aufgewärmt wird, um Taupunktkorrosionen in ihm zu vermeiden. Der Vorteil gemäß der Erfindung besteht darin, daß das Frischluftgebläse 5 vor jeglicher Korrosion geschützt ist, so daß Reparaturen und damit verbundene kostspielige Ausfälle der Kesselanlage vermieden werden.The usual circulating regenerative preheater, rotary luvo 1, is flowed through by the hot flue gases in the direction of the arrow 2 and by the fresh air to be heated in the direction of the arrow 3. In front of the rotary luvo 1 in the direction of the flue gas flow 2 , the tubular air preheater 4 is arranged according to the invention, to which part of the cold air flow supplied by the fan 5 is fed. This partial air flow is introduced into the suction line 6 of the blower 5 after it has been heated in the tube air preheater 4, whereby the cold air supplied to the circulating air preheater 1 is warmed up enough to avoid dew point corrosion in it. The advantage according to the invention is that the fresh air blower 5 is protected from any corrosion, so that repairs and associated costly failures of the boiler system are avoided.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1962W0031758 DE1236711B (en) | 1962-02-28 | 1962-02-28 | Arrangement to protect a regenerative air preheater and the fresh air fan of an oil-fired steam generator against acid corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1962W0031758 DE1236711B (en) | 1962-02-28 | 1962-02-28 | Arrangement to protect a regenerative air preheater and the fresh air fan of an oil-fired steam generator against acid corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1236711B true DE1236711B (en) | 1967-03-16 |
Family
ID=7599855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1962W0031758 Pending DE1236711B (en) | 1962-02-28 | 1962-02-28 | Arrangement to protect a regenerative air preheater and the fresh air fan of an oil-fired steam generator against acid corrosion |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1236711B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2434101A1 (en) * | 1974-07-16 | 1976-02-05 | Rothemuehle Brandt Kritzler | REGENERATIVE AIR PREHEATER WITH ADDITIONAL HEATING SURFACES |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363870A (en) * | 1941-10-10 | 1944-11-28 | Air Preheater | Temperature control of heat transfer surfaces |
-
1962
- 1962-02-28 DE DE1962W0031758 patent/DE1236711B/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363870A (en) * | 1941-10-10 | 1944-11-28 | Air Preheater | Temperature control of heat transfer surfaces |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2434101A1 (en) * | 1974-07-16 | 1976-02-05 | Rothemuehle Brandt Kritzler | REGENERATIVE AIR PREHEATER WITH ADDITIONAL HEATING SURFACES |
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