EP0908669B1 - Low pressure feedwater preheater - Google Patents
Low pressure feedwater preheater Download PDFInfo
- Publication number
- EP0908669B1 EP0908669B1 EP97810761A EP97810761A EP0908669B1 EP 0908669 B1 EP0908669 B1 EP 0908669B1 EP 97810761 A EP97810761 A EP 97810761A EP 97810761 A EP97810761 A EP 97810761A EP 0908669 B1 EP0908669 B1 EP 0908669B1
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- EP
- European Patent Office
- Prior art keywords
- low
- bank
- pressure feedwater
- feedwater preheater
- steam
- 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 - Lifetime
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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
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
Definitions
- the invention relates to a low-pressure feed water preheater heated by bleed steam or heaters with two-flow tube bundles Tube plate design for power plants, and in particular a construction for the Tube bundle carrier.
- Low pressure feed water preheaters are well known. You are in one Power plant located between the condenser and a degasser and serve to preheat the feed water in a steam-water cycle Heat exchange between steam and feed water flowing in pipes. The For this purpose, steam is tapped by a low-pressure turbine and into the preheater passed where it condenses on the pipes and heats the feed water. In one District heating plant is used by the heater to reheat the heating water through a district heating circuit flows.
- the feed water flows from a water chamber divided into two parts one end of the preheater is arranged via a two-flow system.
- This consists of a bundle of tubes that are either straight along with one Deflection chamber or U-shaped.
- the water flows from the first Part of the water chamber through the pipes via the deflection chamber or via the U back to the second part of the water chamber, using the cold half of the pipes as cold leg or the warm half is referred to as a warm leg.
- the tube bundle is in one tube feedwater preheater Plate firmly anchored, which is then arranged in the water chamber. furthermore the tubes are held and supported by bundle beams, each made of Support plates and side members exist.
- the steam tapped by the turbine enters the steam inlet opening Low pressure feed water preheater and is distributed through a baffle plate, so he first in an annular vapor space between the casing and flows into the tube bundle and then radially in along the entire tube bundle length the bundle penetrates and condenses on the pipe surfaces.
- the so-called Bundelgasse Direct inflow of the steam in the Bundelgasse is provided by side panels arranged on the outside prevented.
- One or more ventilation pipes are arranged in the Bundelgasse. These have several suction holes through which the non-condensable gases be sucked off. The gases collect in the zone where the lowest pressure prevails.
- a feed water preheater is described in the Bundelgasse between the cold and warm leg of the tube bundle one Partition that extends along the entire length of the tube bundle extends.
- the dividing wall in the Bundelgasse results on both sides and in a low pressure zone near it, which does not extend into the tube bundle.
- the continuous partition wall over the bundle length is with the side panels Bundle carrier welded.
- the perforated support plate consisting of two halves is also welded to the side panels and the partition.
- the Welded connections are technically well suited for this type of preheater
- fabrication of the bundle carriers requires one with this welded construction great time, labor and cost.
- the invention has for its object the great effort in manufacturing to avoid the bundle carrier with partition and a construction for the To find bundle carriers whose manufacture is as simple and inexpensive as possible and in particular requires as little or no welding work as possible.
- the two-flow tube bundle has a bundle support structure, the support plates of each made in one piece and thus continuous, and the partition individual sheet metal parts that exist between the side panels and continuous support plates are arranged.
- the sheet metal parts of the partition are mechanical guided by a toothing in the support plates.
- the sheet metal parts of the Partition wall at least one on each side facing the support plates Serrations that match openings in the support plate.
- the side panels are like the support plates, also made from a single piece, continuously and passed through the support plate.
- This construction for the bundle carrier has the advantage that the individual parts that Support plates, dividing wall parts and side panels each made of one piece by machine manufactured and, if possible, assembled without any further machine operation become.
- the time-consuming welding work is no longer necessary and the result is a strong one simplified manufacture of the bundle carrier, saving time and costs be significantly reduced.
- the feed water preheater in Figures 1 a), b) and 2 points at its Steam jacket 1 has a steam inlet opening 2 and a condensate outlet opening 3 on.
- the steam jacket 1 encloses a steam chamber 4 and a tube bundle 5 the steam inlet opening 2 is a cylindrically curved baffle plate 13, by which the incoming steam is deflected into the steam space 4 and that Tube bundle 5 does not flow directly.
- At one end of the preheater is one divided water chamber 6 with inlet and outlet openings 18 arranged from the the feed water through the two legs of the tube bundle 5 and back into the Water chamber flows.
- the tube bundle 5 is anchored in a tube sheet 7 and supported by a tube bundle support, the support plates 8 and side plates 9 having.
- the support plates 8 are also tie rods 10 with spacers 19 and Nuts 20 held together. Between the pipe legs in Bundelgasse a partition 11 is arranged, on both sides of which there are suction pipes 12 The steam is vented. As already mentioned, the zone is formed here of the lowest pressure so that the non-condensable gases are in this zone collect and be led away through openings in the suction pipes 12.
- Figure 2 shows the profile of a support plate 8 with drilled openings for the suction pipes 12 and the tie rods 10 and milled slot openings 14 for the side plates 9. The The outline of the perforation for the tube bundle is indicated by dashed lines.
- the support plates 8 are also on two on the inner wall of the steam jacket 1 arranged angle 15 supported on which the support plates 8 with the Pipe bundle 5 due to the uneven thermal expansion of the warm and cold pipe leg, can move freely in the longitudinal and transverse directions.
- the Support plate 8 also has four supports 21 in the form of wings for the purpose lateral guidance of the bundle carrier on the inner wall of the steam jacket 1.
- the Supports 21 are each shaped so that their edge parallel to the inner wall of the Steam jacket 1 runs.
- the support 21 is not directly on the inner wall of the Steam jacket 1, but it exists between it and the inner wall of the Steam jacket 1 a free or play for displacements of the support plates 8th due to thermal expansion of the tube bundle.
- the support plate 8 may thus due to thermal expansion of the tube bundle 5 move to Support 21 comes into contact with the inner wall of the steam jacket 1 and there is supported.
- FIG. 3 again shows the support plates 8 with milled slot openings 14 the side plates 9 are pushed, and the drill holes for the Suction pipes 12 and the tie rods 10.
- the individual sheet metal parts of the partition 11 have, for example, at all four corners and in the middle of the edges that the Support plate 8 are facing, teeth 16 according to Figure 4.
- This Teeth 16 are openings 17 in them in the assembly during assembly Support plate 8 introduced.
- the attachment and guidance of the partition parts 11 in the Support plates 8 are through the teeth on each side that of the support plate is guaranteed.
- apart from the shown Tooth 16 with right-angled teeth also other types of teeth conceivable, such as gears with triangular shapes.
- the support plates 8 are by means of tie rods 10, spacer sleeves 19 and nuts 20 clamped together.
- the tie rods 10 and spacer sleeves 19 expand as a result Warm up and move together with the support plates 8 in Longitudinal direction.
- the tubes also expand in the longitudinal direction, however a different extent and due to the different temperatures of the cold and warm leg uneven, which is due to the free displacement of the tubes is guaranteed in the support plates 8. All components of the bundle carrier according to the invention consisting of support plates, dividing wall parts, Side plates, spacers and tie rods are completed in the factory Prefabricated and fast, inexpensive without (or as little) welding work assembled.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Die Erfindung betrifft einen durch Anzapfdampf beheizten Niederdruck-Speisewasservorwärmer oder Heizer mit Zwei-Fluss-Rohrbündeln der Rohrbodenbauart für Kraftwerksanlagen, und insbesondere eine Konstruktion für die Rohrbündelträger.The invention relates to a low-pressure feed water preheater heated by bleed steam or heaters with two-flow tube bundles Tube plate design for power plants, and in particular a construction for the Tube bundle carrier.
Niederdruck-Speisewasservorwärmer sind allgemein bekannt. Sie sind in einer Kraftwerksanlage zwischen dem Kondensator und einem Entgaser angeordnet und dienen der Vorwärmung des Speisewassers in einem Dampf-Wasserkreislauf durch Wärmetausch zwischen Dampf und in Rohren fliessendem Speisewasser. Der Dampf wird hierzu von einer Niederdruckturbine angezapft und in den Vorwärmer geleitet, wo er an den Rohren kondensiert und das Speisewasser erwärmt. In einem Fernheizwerk dient der Heizer der Wiederaufwärmung von Heizwasser, das durch einen Fernheizkreislauf fliesst.Low pressure feed water preheaters are well known. You are in one Power plant located between the condenser and a degasser and serve to preheat the feed water in a steam-water cycle Heat exchange between steam and feed water flowing in pipes. The For this purpose, steam is tapped by a low-pressure turbine and into the preheater passed where it condenses on the pipes and heats the feed water. In one District heating plant is used by the heater to reheat the heating water through a district heating circuit flows.
Mit dem angezapften Dampf sowie aus der Atmosphäre, insbesondere bei im Vakuumbereich betriebene Vorwärmer, gelangt Luft (nicht kondensierbare Gase) in den Vorwärmer, welche den Wärmeübergang behindert. Diese Behinderung wird durch eine Entlüftung der Apparate durch Absaugen dieser nicht kondensierbaren Gase behoben, weswegen verschiedene Massnahmen getroffen werden müssen, um die Gase möglichst vollständig wegzuführen. With the tapped steam as well as from the atmosphere, especially with im Vacuum-operated preheater, air (non-condensable gases) enters the preheater, which hinders the heat transfer. This disability will by venting the devices by suctioning off these non-condensable ones Fixed gases, which is why various measures must be taken to remove the gases as completely as possible.
Das Speisewasser fliesst von einer in zwei Teile unterteilte Wasserkammer, die an einem Ende des Vorwärmers angeordnet ist, über ein Zwei-Fluss-System. Dies besteht aus einem Bündel von Rohren, die entweder gerade zusammen mit einer Umlenkkammer oder U-förmig ausgelegt sind. Das Wasser fliesst von dem ersten Teil der Wasserkammer durch die Rohre über die Umlenkkammer bzw. über das U zurück in den zweiten Teil der Wasserkammer, wobei die kalte Hälfte der Rohre als kalter Schenkel bzw. die warme Hälfte als warmer Schenkel bezeichnet wird. In Speisewasservorwärmem der Rohrbodenbauart sind die Rohrbündel jeweils in einer Platte fest verankert, der anschliessend der Wasserkammer angeordnet ist. Femer sind die Rohre durch Bündelträger gehalten und gestützt, die jeweils aus Stützplatten und Längsträgern bestehen.The feed water flows from a water chamber divided into two parts one end of the preheater is arranged via a two-flow system. This consists of a bundle of tubes that are either straight along with one Deflection chamber or U-shaped. The water flows from the first Part of the water chamber through the pipes via the deflection chamber or via the U back to the second part of the water chamber, using the cold half of the pipes as cold leg or the warm half is referred to as a warm leg. In The tube bundle is in one tube feedwater preheater Plate firmly anchored, which is then arranged in the water chamber. furthermore the tubes are held and supported by bundle beams, each made of Support plates and side members exist.
Der von der Turbine angezapfte Dampf tritt durch die Dampfeintrittsöffnung in den Niederdruck-Speisewasservorwärmer und wird durch ein Prallblech verteilt, sodass er zunächst in einen ringförmigen Dampfraum zwischen dem Gehäusemantel und dem Rohrbündel fliesst und sodann entlang der gesamten Rohrbündellänge radial in das Bündel dringt und an den Rohroberflächen kondensiert. In der Mitte des Rohrbündels ist ein freier Raum, die sogenannte Bündelgasse. Direktes Einströmen des Dampfes in die Bündelgasse wird durch aussen angeordnete Seitenbleche verhindert. In der Bündelgasse sind ein oder mehrere Entlüftungsrohre angeordnet. Diese weisen mehrere Absauglöcher auf, durch die die nicht kondensierbaren Gase abgesaugt werden. Die Gase sammeln sich in der Zone, in der der tiefste Druck herrscht. Es hat sich gezeigt, dass die Zone des tiefsten Drucks nicht parallel zu den Rohren und entlang der Mitte der Bündelgasse verläuft, sondern von der Mitte des Bündels sich allmählich zum kalten Schenkel des Rohrbündels verschiebt. Sie verläuft also von der Mitte der Umlenkungsseite der Rohre schräg zur kalten Eintrittsseite der Rohre bei der Wasserkammer. Ein Absaugrohr ideal in dieser Tiefstdruckzone zu plazieren ist nicht möglich, da ein solches Absaugrohr an der Rohrbodenseite am oder im kalten Schenkel plaziert werden müsste.The steam tapped by the turbine enters the steam inlet opening Low pressure feed water preheater and is distributed through a baffle plate, so he first in an annular vapor space between the casing and flows into the tube bundle and then radially in along the entire tube bundle length the bundle penetrates and condenses on the pipe surfaces. In the middle of Rohrbündels is a free space, the so-called Bundelgasse. Direct inflow of the steam in the Bundelgasse is provided by side panels arranged on the outside prevented. One or more ventilation pipes are arranged in the Bundelgasse. These have several suction holes through which the non-condensable gases be sucked off. The gases collect in the zone where the lowest pressure prevails. It has been shown that the zone of the lowest pressure is not parallel to the Tubes and runs along the middle of Bundelgasse, but from the middle of the Bundle gradually moves to the cold leg of the tube bundle. she So runs obliquely from the middle of the deflection side of the pipes to the cold one Entry side of the pipes at the water chamber. A suction pipe ideal in this It is not possible to place the low-pressure zone because such a suction pipe on the Tube bottom side should be placed on or in the cold leg.
In der DE 28 20 736 ist ein Speisewasservorwärmer beschrieben, der in der Bündelgasse zwischen dem kalten und warmen Schenkel des Rohrbündels eine Trennwand aufweist, die sich entlang der gesamten Länge des Rohrbündels erstreckt. Durch die Trennwand ergeben sich in der Bündelgasse beidseitig und in der Nähe von ihr je eine Tiefstdruckzone, die sich nicht in das Rohrbündel erstreckt. Hier auf jeder Seite der Trennwand sind Absaugrohre mit Entlüftungsöffnungen angeordnet, durch die die nicht kondensierbaren Gase abgesaugt werden. Dadurch ist sichergestellt, dass sich Entlüftungsrohre an den Stellen der tiefsten Drücke sowohl in der warmen als auch in der kalten Bündelhälfte befinden.DE 28 20 736 a feed water preheater is described in the Bundelgasse between the cold and warm leg of the tube bundle one Partition that extends along the entire length of the tube bundle extends. The dividing wall in the Bundelgasse results on both sides and in a low pressure zone near it, which does not extend into the tube bundle. There are suction pipes with ventilation openings on each side of the partition arranged through which the non-condensable gases are extracted. Thereby it is ensured that ventilation pipes are located at the lowest pressures both in the warm and in the cold half of the bundle.
Die über die Bündellänge durchgehende Trennwand ist mit den Seitenblechen der Bündelträger verschweisst. Die aus zwei Hälften bestehende perforierte Stützplatte ist ebenfalls mit den Seitenblechen und der Trennwand veschweisst. Die Schweissverbindungen sind für diese Art Vorwärmer technisch gut geeignet, die Fabrikation der Bündelträger erfordert jedoch mit dieser Schweisskonstruktion einen grossen Zeit-, Arbeits- sowie Kostenaufwand.The continuous partition wall over the bundle length is with the side panels Bundle carrier welded. The perforated support plate consisting of two halves is also welded to the side panels and the partition. The Welded connections are technically well suited for this type of preheater However, fabrication of the bundle carriers requires one with this welded construction great time, labor and cost.
Der Erfindung liegt die Aufgabe zugrunde, den grossen Aufwand in der Fabrikation der Bündelträger mit Trennwand zu vermeiden und eine Konstruktion für die Bündelträger zu finden, deren Fabrikation möglichst einfach und kostengünstig ist und insbesondere möglichst wenig oder keine Schweissarbeit erfordert.The invention has for its object the great effort in manufacturing to avoid the bundle carrier with partition and a construction for the To find bundle carriers whose manufacture is as simple and inexpensive as possible and in particular requires as little or no welding work as possible.
Diese Aufgabe ist erfindungsgemäss durch einen Niederdruck-Speisevorwärrner oder Heizer gemäss des Oberbegriffs des Hauptanspruchs gelöst, dessen Zwei-Fluss-Rohrbündel eine Bündelträgerkonstruktion aufweist, deren Stützplatten je aus einem einzigen Stück gefertigt und somit durchgehend sind, und die Trennwand aus einzelnen Blechteilen besteht, die zwischen den Seitenblechen und den durchgehenden Stützplatten angeordnet sind.According to the invention, this object is achieved by a low-pressure feed preheater or heater solved according to the preamble of the main claim, the two-flow tube bundle has a bundle support structure, the support plates of each made in one piece and thus continuous, and the partition individual sheet metal parts that exist between the side panels and continuous support plates are arranged.
In einer Ausführung der Erfindung sind die Blechteile der Trennwand mechanisch durch eine Verzahnung in den Stützplatten geführt. Hierzu weisen die Blechteile der Trennwand auf jeder den Stützplatten zugewandten Seiten mindestens eine Verzahnung auf, die zu Öffnungen in der Stützplatte passen. Die Seitenbleche sind, wie die Stützplatten, ebenfalls je aus einem einzigen Stück gefertigt, durchgehend und durch die Stützplatte geführt.In one embodiment of the invention, the sheet metal parts of the partition are mechanical guided by a toothing in the support plates. For this purpose, the sheet metal parts of the Partition wall at least one on each side facing the support plates Serrations that match openings in the support plate. The side panels are like the support plates, also made from a single piece, continuously and passed through the support plate.
Diese Konstruktion für die Bündelträger hat den Vorteil, dass die einzelnen Teile, die Stützplatten, Trennwandteile und Seitenbleche je aus einem Stück maschinell gefertigt und möglichst ohne weiteren Maschinenarbeitsgang zusammengebaut werden. Die aufwendigen Schweissarbeiten fallen weg, und es ergibt sich eine stark vereinfachte Fabrikation des Bündelträgers, mit der Zeit eingespart und Kosten bedeutend reduziert werden.This construction for the bundle carrier has the advantage that the individual parts that Support plates, dividing wall parts and side panels each made of one piece by machine manufactured and, if possible, assembled without any further machine operation become. The time-consuming welding work is no longer necessary and the result is a strong one simplified manufacture of the bundle carrier, saving time and costs be significantly reduced.
Es zeigen:
Der Speisewasservorwärmer in den Figuren 1 a), b) und 2 weist an seinem
Dampfmantel 1 eine Dampfeintrittsöffnung 2 und eine Kondensataustrittsöffnung 3
auf. Der Dampfmantel 1 umschliesst einen Dampfraum 4 und ein Rohrbündel 5. An
der Dampfeintrittsöffnung 2 ist ein zylindrisch gewölbtes Prallblech 13 angeordnet,
durch das der eintretende Dampf in den Dampfraum 4 abgelenkt wird und das
Rohrbündel 5 nicht direkt anströmt. An einem Ende des Vorwärmers ist eine
unterteilte Wasserkammer 6 mit Ein- und Austrittsöffnungen 18 angeordnet, aus der
das Speisewasser durch die beiden Schenkel des Rohrbündels 5 und zurück in die
Wasserkammer fliesst. Das Rohrbündel 5 ist in einem Rohrboden 7 verankert und
durch einen Rohrbündelträger gestützt, der Stützplatten 8 und Seitenbleche 9
aufweist. Die Stützplatten 8 sind femer durch Tie-Rods 10 mit Abstandhülsen 19 und
Muttern 20 zusammengehalten. Zwischen den Rohrschenkeln in der Bündelgasse ist
eine Trennwand 11 angeordnet, beidseitig davon sind Absaugrohre 12 zur
Entlüftung des Dampfes vorgesehen. Wie bereits erwähnt bildet sich hier die Zone
des tiefsten Drucks, sodass die nicht kondensierbaren Gase sich in dieser Zone
sammeln und durch Öffnungen in den Absaugrohren 12 weggeführt werden. Figur 2
zeigt das Profil einer Stützplatte 8 mit gebohrten Öffnungen für die Absaugrohre 12
und die Tie-Rods 10 sowie gefrästen Schlitzöffnungen 14 für die Seitenbleche 9. Der
Umriss der Perforierung für das Rohrbündel ist mit gestrichelten Linien angedeutet.
Die Stützplatten 8 sind ferner auf zwei an der Innenwand des Dampfmantels 1
angeordneten Winkel 15 abgestützt, auf denen die Stützplatten 8 mit dem
Rohrbündel 5 infolge der ungleichen thermischen Ausdehnung des warmen und
kalten Rohrschenkels, in Längs- und Querrichtung sich frei bewegen können. Die
Stützplatte 8 weist ferner vier Abstützungen 21 in Form von Flügeln auf zwecks
seitlicher Führung der Bündelträger auf der Innenwand des Dampfmantels 1. Die
Abstützungen 21 sind jeweils so geformt, dass ihr Rand parallel zur Innenwand des
Dampfmantels 1 verläuft. Die Abstützung 21 liegt nicht direkt an der Innenwand des
Dampfmantels 1, sondern es besteht zwischen ihr und der Innenwand des
Dampfmantels 1 ein Frei- oder Spielraum für Verschiebungen der Stützplatten 8
infolge thermischer Ausdehnungen des Rohrbündels. Die Stützplatte 8 darf sich also
aufgrund thermischer Ausdehnungen des Rohrbündels 5 verschieben bis die
Abstützung 21 mit der Innenwand des Dampfmantels 1 in Berührung kommt und dort
abgestützt wird.The feed water preheater in Figures 1 a), b) and 2 points at its
Figur 3 zeigt wiederum die Stützplatten 8 mit gefrästen Schlitzöffnungen 14, durch
die die Seitenbleche 9 geschoben werden, sowie die Bohröffnungen für die
Absaugrohre 12 und die Tie-Rods 10. Die einzelnen Blechteile der Trennwand 11
weisen beispielsweise an allen vier Ecken sowie in der Mitte der Kanten, die der
Stützplatte 8 zugewandt sind, Verzahnungen 16 gemäss Figur 4 auf. Diese
Verzahnung 16 werden bei der Montage in ihnen angepasste Öffnungen 17 in der
Stützplatte 8 eingeführt. Die Befestigung und Führung der Trennwandteile 11 in den
Stützplatten 8 sind durch die Verzahnungen auf jeder Seite, die der Stützplatte
zugewandt ist, gewährleistet. Selbstverständlich sind ausser der dargestellten
Verzahnung 16 mit rechtwinklig geformten Zähnen auch weitere Verzahnungsformen
denkbar, wie zum Beispiel Verzahnungen mit Dreiecksformen.FIG. 3 again shows the
Die Stützplatten 8 sind mittels Tie-Rods 10, Abstandhülsen 19 und Muttern 20
zusammensgespannt. Die Tie-Rods 10 und Abstandhülsen 19 dehnen sich infolge
Aufwärmung und verschieben sich zusammen mit den Stützplatten 8 in
Längsrichtung. Die Rohre dehnen sich ebenfalls in der Längsrichtung, jedoch zu
einem anderen Ausmass und durch die verschiedenen Temperaturen des kalten und
warmen Schenkels ungleichmässig, welches durch die freie Verschiebung der Rohre
in den Stützplatten 8 gewährleistet ist. Sämtliche Bestandteile des
erfindungsgemässen Bündelträgers bestehend aus Stützplatten, Trennwandteilen,
Seitenblechen, Abstandhülsen und Tie-Rods werden in der Fabrik vollständig
vorgefertig und schnell, ohne (oder möglichst wenig) Schweissarbeit kostengünstig
zusammengebaut. The
- 11
- Dampfmantelsteam jacket
- 22
- DampfeintrittsöffnungSteam inlet opening
- 33
- KondensataustrittsöffnungCondensate outlet opening
- 44
- Dampfraumsteam room
- 55
- Rohrbündeltube bundle
- 66
- Wasserkammerwater chamber
- 77
- Rohrbodentube sheet
- 88th
- Stützplattesupport plate
- 99
- SeitenblechPage sheet
- 1010
- Tie-RodTie-Rod
- 1111
- Trennwandteilpartition part
- 1212
- Absaugrohresuction pipes
- 1313
- Prallblechbaffle
- 1414
- gefräste Schlitzöffnungenmilled slot openings
- 1515
- Abstützwinkelsupport angle
- 1616
- Verzahnungengearing
- 1717
- Öffnung für VerzahnungOpening for toothing
- 1818
- Ein-/AustrittsöffnungInlet / outlet port
- 1919
- Abstandhülsenspacer sleeves
- 2020
- Mutternnuts
- 2121
- Abstützungensupports
Claims (7)
- Low-pressure feedwater preheater or heater in power station plants which is heated by bleed steam, having in each case at least one steam inlet opening (2) and condensate outlet opening (3), which are made in the steam shell (1), and a two-pass tube bank (5) of the plate type of construction, which has a cold and a hot leg, at least one supporting plate (8) arranged perpendicularly to the bank axis, and side plates (9) running parallel to the bank axis, and in which, in the centre of the tube bank (5) between the hot and the cold bank leg, a partition (11) is arranged along the entire length of the tube legs, characterized in that the individual supporting plates (8) are each made of a single piece and are continuous, and the partition (11) consists of individual sheet-metal parts which are connected to the supporting plates (8).
- Low-pressure feedwater preheater or heater according to Claim 1, characterized in that the side plates (9) are each made of a single piece and are continuous and are guided by slotted openings (14) in the supporting plates (8).
- Low-pressure feedwater preheater or heater according to Claim 1, characterized in that the individual sheet-metal parts of the partition (11) have one or more indentations (16) on each of the two sides which faces a supporting plate (8), and each supporting plate (8) has an opening (17) adapted to each of these indentations (16).
- Low-pressure feedwater preheater or heater according to one of Claims 1 to 3, characterized in that the supporting plates (8) of the bank carrier are tightened together by means of tie rods (10) and spacer sleeves (19) between the supporting plates (8).
- Low-pressure feedwater preheater or heater according to Claim 1, characterized in that the supporting plates (8) with the tube banks (5) are supported on two angles (15) arranged on the inner wall of the steam shell (1), so that the tube bank (5) moves freely horizontally as a result of thermal expansions.
- Low-pressure feedwater preheater or heater according to Claim 1, characterized in that each supporting plate (8) has at least four supports (21), which are arranged with a clearance space relative to the inner wall of the steam shell (1), which clearance space permits a free displacement of the bank carrier in longitudinal and transverse direction.
- Low-pressure feedwater preheater or heater according to Claim 1, characterized in that suction tubes (12) for drawing off non-condensable gases run on either side of the partition (11) in zones of lowest pressure.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59708896T DE59708896D1 (en) | 1997-10-09 | 1997-10-09 | Low-pressure feedwater |
| EP97810761A EP0908669B1 (en) | 1997-10-09 | 1997-10-09 | Low pressure feedwater preheater |
| JP10285266A JP2000240903A (en) | 1997-10-09 | 1998-10-07 | Low pressure supply water preheating apparatus or heater |
| US09/168,995 US5975030A (en) | 1997-10-09 | 1998-10-09 | Low-pressure feedwater preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97810761A EP0908669B1 (en) | 1997-10-09 | 1997-10-09 | Low pressure feedwater preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0908669A1 EP0908669A1 (en) | 1999-04-14 |
| EP0908669B1 true EP0908669B1 (en) | 2002-12-04 |
Family
ID=8230424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97810761A Expired - Lifetime EP0908669B1 (en) | 1997-10-09 | 1997-10-09 | Low pressure feedwater preheater |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5975030A (en) |
| EP (1) | EP0908669B1 (en) |
| JP (1) | JP2000240903A (en) |
| DE (1) | DE59708896D1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014113109A1 (en) * | 2013-01-21 | 2014-07-24 | Maarky Thermal Systems Inc. | Dual end plate subcooling zone for a feedwater heater |
| US9541280B2 (en) * | 2014-06-04 | 2017-01-10 | Fives North American Combustion, Inc. | Ultra low NOx combustion for steam generator |
| CN106288322B (en) * | 2016-10-18 | 2022-01-04 | 东方电气集团东方锅炉股份有限公司 | Longitudinal-grazing-free heat exchange superheat section structure for reducing diameter of low-pressure heater equipment |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2995341A (en) * | 1959-01-08 | 1961-08-08 | Griscom Russell Co | Feed water heater sub-cooling zone |
| CH393366A (en) * | 1962-05-18 | 1965-06-15 | Bbc Brown Boveri & Cie | Steam-heated feed water preheater |
| US3630276A (en) * | 1970-02-10 | 1971-12-28 | Nasa | Shell-side liquid metal boiler |
| US3683866A (en) * | 1970-11-20 | 1972-08-15 | Combustion Eng | Superheating steam generator |
| DE2458437C2 (en) * | 1974-12-10 | 1976-10-14 | Kraftwerk Union Ag | FEED WATER PREHEATER WITH TWO STEAM ROOMS |
| DE2642800C2 (en) * | 1976-09-23 | 1982-12-09 | Deggendorfer Werft Und Eisenbau Gmbh, 8360 Deggendorf | Tube sheet connection for tube bundle reactors or tube bundle heat exchangers |
| DE2820736A1 (en) | 1978-05-12 | 1979-11-15 | Bbc Brown Boveri & Cie | FEED WATER PREHEATER |
| FR2477265A1 (en) * | 1980-02-29 | 1981-09-04 | Framatome Sa | PRE-HEATING STEAM GENERATOR |
| FR2644281B1 (en) * | 1989-03-09 | 1991-06-07 | Framatome Sa | DEVICE FOR STABILIZING THE TUBES OF THE BEAM OF A STEAM GENERATOR COMPRISING ANTI-VIBRATION BARS |
-
1997
- 1997-10-09 EP EP97810761A patent/EP0908669B1/en not_active Expired - Lifetime
- 1997-10-09 DE DE59708896T patent/DE59708896D1/en not_active Expired - Lifetime
-
1998
- 1998-10-07 JP JP10285266A patent/JP2000240903A/en active Pending
- 1998-10-09 US US09/168,995 patent/US5975030A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0908669A1 (en) | 1999-04-14 |
| DE59708896D1 (en) | 2003-01-16 |
| US5975030A (en) | 1999-11-02 |
| JP2000240903A (en) | 2000-09-08 |
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