EP0315870B1 - Steam generator - Google Patents

Steam generator Download PDF

Info

Publication number
EP0315870B1
EP0315870B1 EP88118144A EP88118144A EP0315870B1 EP 0315870 B1 EP0315870 B1 EP 0315870B1 EP 88118144 A EP88118144 A EP 88118144A EP 88118144 A EP88118144 A EP 88118144A EP 0315870 B1 EP0315870 B1 EP 0315870B1
Authority
EP
European Patent Office
Prior art keywords
steam generator
line
cleansing
bores
tube
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
Application number
EP88118144A
Other languages
German (de)
French (fr)
Other versions
EP0315870A1 (en
Inventor
Zvonimir Dipl.-Ing. Sterk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0315870A1 publication Critical patent/EP0315870A1/en
Application granted granted Critical
Publication of EP0315870B1 publication Critical patent/EP0315870B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0229—Double end plates; Single end plates with hollow spaces
    • 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
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/483—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers specially adapted for nuclear steam generators

Definitions

  • the invention relates to a steam generator with an elongated housing in the vertical direction, which includes a U-shaped tube bundle, the legs of which are gripped with their tube ends in a horizontal tube sheet, a drain line being provided on the tube sheet, which has vertical bores in the area of the Pipe bundle leads.
  • the drain pipe in the steam generator according to DE-B 25 23 874 is the space between the tube sheet and a so-called baffle plate placed above it. Holes are provided in the baffle over the entire cross-section of the housing, so that the entire cross-section of the U-tube bundle is covered by the drain pipe. Because of the large cross-section of this "drain pipe", separating plates are provided which radiate from the center of the steam generator housing and form sector-shaped partial lines. Each of the twelve sub-lines is connected to a common ring line via a valve. This should make the cleaning process more economical, because you can choose between an optimal cleaning and a saving of cleaning liquid as required. However, this requires a great deal of structural effort. In contrast, the object of the invention is precisely to obtain a sufficient blowdown with the least possible construction effort.
  • the drain pipe in the form of a horizontal line extending across the width of the tube bundle is incorporated into the tube sheet in such a way that the bores emanating from it lead into a space between the legs of the tube bundle.
  • the invention does not require any additional components at all.
  • the drain pipe is rather incorporated into the tube sheet itself, e.g. through a drilling process, i.e. with cutting deformation.
  • the effort required for machine processing is relatively low and can also be carried out as part of a so-called retrofit.
  • the invention has the great advantage that the drain pipe cannot be endangered by thermal stresses or the like. In any case, a sufficient blowdown is obtained with significantly less construction effort than with the known steam generator.
  • the drain pipe leading to an additional pipe in a steam generator according to DE-A 29 49 975 requires more effort because the additional pipe in the space between the pipes of the steam generator in the vicinity of the tube plate has to be supported in a vibration-proof manner without the fastening stresses may be caused by thermal expansion.
  • the invention can advantageously also be implemented in such a way that the horizontal line comprises two sections that start from opposite sides and lie on one diameter. This makes processing easier insofar as the depth of penetration is practically halved when the line is worked into the tube sheet. Nevertheless, the advantages of the invention, namely the use of the tube base, which is present anyway, to form a drain pipe, which works vibration-proof and free of thermal stress, are fully retained.
  • the distance between the vertical bores should decrease from the edge to the center of the steam generator so that a particularly intensive drainage effect is available in the low-flow area in the center of the tube bundle.
  • the smallest distance between two possible vertical bores is preferably at most half the largest vertical distance. This is a clear difference compared to the sub-lines according to DE-B 25 23 874, whose passage cross-sections decrease considerably towards the center of the steam generator.
  • drain holes can be provided which extend under the annular space and lead with vertical bores in the latter. This prevents the accumulation of corrosion-promoting deposits in the otherwise unrecorded annulus.
  • the drain holes and the drain line can advantageously be connected to a common drain collector.
  • the steam generator comprises a housing 1 which is elongated in the vertical direction and encloses a U-tube bundle 3 with its cylindrical wall 2.
  • the tube ends 5 of the legs 6 and 7 of the U-tube bundle 3 are contained in a tube sheet 8, which divides the cylindrical housing 1 in a horizontal plane.
  • the steam generator housing 1 is closed with a spherical plate 10, in which two chambers 11 and 12 are formed, which serve to apply the primary water of the pressurized water reactor to the U-tube bundle 3.
  • FIG. 2 shows that the legs 6 and 7 of the U-tube bundle 3 are adapted to the cylindrical cross section of the steam generator housing 1. Between the two legs 6 and 7 there is a pipe lane 15 which is expanded in a circular manner in the center of the steam generator. The limits of the cross section of the U-tube bundle 3 are shown in FIG. 2 with a dashed line 16.
  • the tube sheet 8 has a thickness of, for example, 500 mm.
  • a drain line 18 is incorporated in the form of a bore with two sections 19 and 20.
  • the sections 19 and 20 lie, as shown in FIG 2, on a diameter, so that vertical bores 22, which connect the sections 19 and 20 with the space located above the tube sheet 8, into the tube lane 15 between the two legs 6 and 7 of the U-tube bundle 8.
  • the distance A between the bores 22 decreases increasingly from the edge towards the inside. It is only about a third of the distance A between the two outermost bores in the area of the circular extension 16.
  • the sections 19 and 20 lead to pipe sockets 25 which are welded to the steam generator housing 1.
  • pipe sockets 25 which are welded to the steam generator housing 1.
  • short horizontal bores 26 of which a vertical connecting bore 27 in an annular space 28 between the housing wall 2 and a cylindrical jacket 30 surrounding the U-tube bundle 3.
  • the connecting pieces 29 of the horizontal Blowdown bores 26 and sections 19 and 20 are connected to a common drainage line 32, as indicated in FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Description

Die Erfindung betrifft einen Dampferzeuger mit einem in vertikaler Richtung länglichen Gehäuse, das ein U-förmiges Rohrbündel einschließt, dessen Schenkeln mit ihren Rohrenden in einem horizontalen Rohrboden gefaßt sind, wobei an dem Rohrboden eine Abschlämmleitung vorgesehen ist, die mit vertikalen Bohrungen in den Bereich des Rohrbündels führt.The invention relates to a steam generator with an elongated housing in the vertical direction, which includes a U-shaped tube bundle, the legs of which are gripped with their tube ends in a horizontal tube sheet, a drain line being provided on the tube sheet, which has vertical bores in the area of the Pipe bundle leads.

Die Abschlämmleitung ist bei dem Dampferzeuger nach der DE-B 25 23 874 der Zwischenraum zwischen dem Rohrboden und einem darüber mit Abstand angebrachten sogenannten Leitblech. In dem Leitblech sind über den gesamten Gehäusequerschnitt verteilte Bohrungen vorgesehen, so daß der gesamte Querschnitt des U-Rohrbündels von der Abschlämmleitung erfaßt wird. Wegen des großen Querschnitts dieser "Abschlämmleitung" sind strahlenförmig vom Zentrum des Dampferzeugergehäuses ausgehende Trennbleche vorgesehen, die sektorförmige Teilleitungen bilden. Jede der zwölf Teilleitungen ist über ein Ventil an eine gemeinsame Ringleitung angeschlossen. Dadurch soll der Reinigungsvorgang wirtschaftlicher gemacht werden, weil man sich zwischen einem Optimum an Reinigung und einer Ersparnis an Reinigungsflüssigkeit je nach Bedarf entscheiden kann. Voraussetzung dafür ist jedoch ein großer baulicher Aufwand. Demgegenüber besteht die Aufgabe der Erfindung gerade darin, eine ausreichende Abschlämmung mit einem möglichst kleinen baulichen Aufwand zu erhalten.The drain pipe in the steam generator according to DE-B 25 23 874 is the space between the tube sheet and a so-called baffle plate placed above it. Holes are provided in the baffle over the entire cross-section of the housing, so that the entire cross-section of the U-tube bundle is covered by the drain pipe. Because of the large cross-section of this "drain pipe", separating plates are provided which radiate from the center of the steam generator housing and form sector-shaped partial lines. Each of the twelve sub-lines is connected to a common ring line via a valve. This should make the cleaning process more economical, because you can choose between an optimal cleaning and a saving of cleaning liquid as required. However, this requires a great deal of structural effort. In contrast, the object of the invention is precisely to obtain a sufficient blowdown with the least possible construction effort.

Erfindungsgemäß ist vorgesehen, daß die Abschlämmleitung in Form einer horizontalen, über die Breite des Rohrbündels reichenden Leitung in den Rohrboden so eingearbeitet ist, daß die von ihr ausgehenden Bohrungen in einen Zwischenraum zwischen den Schenkeln des Rohrbündels führen.According to the invention it is provided that the drain pipe in the form of a horizontal line extending across the width of the tube bundle is incorporated into the tube sheet in such a way that the bores emanating from it lead into a space between the legs of the tube bundle.

Bei der Erfindung werden im Gegensatz zum Bekannten überhaupt keine zusätzlichen Bauteile benötigt. Die Abschlämmleitung wird vielmehr selbst in den Rohrboden eingearbeitet, z.B. durch einen Bohrvorgang, also mit spanabhebender Verformung. Der dafür .erforderliche Aufwand an Maschinenbearbeitung ist relativ gering und kann bei Bedarf auch noch im Rahmen einer sogenannten Nachrüstung erbracht werden.In contrast to the known, the invention does not require any additional components at all. The drain pipe is rather incorporated into the tube sheet itself, e.g. through a drilling process, i.e. with cutting deformation. The effort required for machine processing is relatively low and can also be carried out as part of a so-called retrofit.

Die Erfindung ergibt den großen Vorteil, daß die Abschlämmleitung nicht durch Wärmespannungen oder dergleichen gefährdet sein kann. Man erhält jedenfalls eine ausreichende Abschlämmung mit wesentlich geringeren baulichen Aufwand als bei dem bekannten Dampferzeuger. Auch die als zusätzliches Rohr in einen Dampferzeuger führende Abschlämmleitung nach der DE-A 29 49 975 erfordert einen größeren Aufwand, weil das zusätzliche Rohr in dem Zwischenraum zwischen den Rohren des Dampferzeugers in der Nähe des Rohrbodens schwingungssicher abgestützt werden muß, ohne daß durch die Befestigung bei Wärmedehnungen Spannungen hervorgerufen werden dürfen.The invention has the great advantage that the drain pipe cannot be endangered by thermal stresses or the like. In any case, a sufficient blowdown is obtained with significantly less construction effort than with the known steam generator. The drain pipe leading to an additional pipe in a steam generator according to DE-A 29 49 975 requires more effort because the additional pipe in the space between the pipes of the steam generator in the vicinity of the tube plate has to be supported in a vibration-proof manner without the fastening stresses may be caused by thermal expansion.

Die Erfindung kann vorteilhaft auch so verwirklicht werden, daß die horizontale Leitung zwei von gegenüberliegenden Seiten ausgehende, auf einem Durchmesser liegende Abschnitte umfaßt. Hierdurch wird die Bearbeitung insofern einfacher, als die Eindringtiefe bei dem Einarbeiten der Leitung in den Rohrboden praktisch halbiert wird. Dennoch bleiben die Vorteile der Erfindung, nämlich die Verwendung des ohnehin vorhandenen Rohrbodens zur Bildung einer Abschlämmleitung, die schwingungssicher und wärmespannungsfrei arbeitet, in vollem Umfang erhalten.The invention can advantageously also be implemented in such a way that the horizontal line comprises two sections that start from opposite sides and lie on one diameter. This makes processing easier insofar as the depth of penetration is practically halved when the line is worked into the tube sheet. Nevertheless, the advantages of the invention, namely the use of the tube base, which is present anyway, to form a drain pipe, which works vibration-proof and free of thermal stress, are fully retained.

Der Abstand der vertikalen Bohrungen sollte sich vom Rand zur Mitte des Dampferzeugers hin verringern, damit im strömungsschwachen Bereich in der Mitte des Rohrbündels eine besonders intensive Abschlämmwirkung vorhanden ist. Vorzugsweise beträgt der kleinste Abstand zwischen zwei beanchbarten vertikalen Bohrungen höchstens die Hälfte des größten vertikalen Abstandes. Dies ist ein klarer Unterschied gegenüber den Teilleitungen nach der DE-B 25 23 874, deren Durchtrittsquerschnitte zur Mitte des Dampferzeugers hin erheblich abnehmen.The distance between the vertical bores should decrease from the edge to the center of the steam generator so that a particularly intensive drainage effect is available in the low-flow area in the center of the tube bundle. The smallest distance between two possible vertical bores is preferably at most half the largest vertical distance. This is a clear difference compared to the sub-lines according to DE-B 25 23 874, whose passage cross-sections decrease considerably towards the center of the steam generator.

Bei einem Dampferzeuger mit einem das Rohrbündel einschließenden zylindrischen Mantel, der mit dem Gehäuse einen Ringraum bildet, können neben der horizontalen Abschlämmleitung weitere horizontale Abschlämmbohrungen vorgesehen sein, die sich unter den Ringraum erstrecken und mit vertikalen Bohrungen in diesen führen. Dies verhindert Ansammlungen von korrosionsfördernden Ablagerungen in den sonst nicht erfaßten Ringraum. Die Abschlämmbohrungen und die Abschlämmleitung können vorteilhaft an einen gemeinsamen Abschlämmsammler angeschlossen sein.In the case of a steam generator with a cylindrical jacket enclosing the tube bundle and which forms an annular space with the housing, in addition to the horizontal drain line, further horizontal drain holes can be provided which extend under the annular space and lead with vertical bores in the latter. This prevents the accumulation of corrosion-promoting deposits in the otherwise unrecorded annulus. The drain holes and the drain line can advantageously be connected to a common drain collector.

Zur näheren Erläuterung der Erfindung wird anhand der Zeichnung ein Ausführungsbeispiel beschrieben. Dabei ist in der

  • FIG 1 der Bodenbereich eines U-Rohrdampferzeugers für einen Druckwasserreaktor in einem Vertikalschnitt dargestellt.
  • Die FIG 2 zeigt den zugehörigen Horizontalschnitt mit Blickrichtung auf den Rohrboden.
For a more detailed explanation of the invention, an embodiment is described with reference to the drawing. It is in the
  • 1 shows the bottom area of a U-tube steam generator for a pressurized water reactor in a vertical section.
  • 2 shows the associated horizontal section with a view of the tube sheet.

Der Dampferzeuger umfaßt ein in vertikaler Richtung längliches Gehäuse 1, das mit seiner zylindrischen Wand 2 ein U-Rohrbündel 3 einschließt. Die Rohrenden 5 der Schenkel 6 und 7 des U-Rohrbündels 3 sind in einem Rohrboden 8 gefaßt, der das zylindrische Gehäuse 1 in einer horizontalen Ebene unterteilt. Unterhalb des Rohrbodens 8 ist das Dampferzeugergehäuse 1 mit einem Kugelboden 10 abgeschlossen, in dem zwei Kammern 11 und 12 gebildet sind, die zur Beaufschlagung des U-Rohrbündels 3 mit dem Primärwasser des Druckwasserreaktors dienen.The steam generator comprises a housing 1 which is elongated in the vertical direction and encloses a U-tube bundle 3 with its cylindrical wall 2. The tube ends 5 of the legs 6 and 7 of the U-tube bundle 3 are contained in a tube sheet 8, which divides the cylindrical housing 1 in a horizontal plane. Below the tube plate 8, the steam generator housing 1 is closed with a spherical plate 10, in which two chambers 11 and 12 are formed, which serve to apply the primary water of the pressurized water reactor to the U-tube bundle 3.

Die FIG 2 zeigt, daß die Schenkel 6 und 7 des U-Rohrbündels 3 dem zylindrischen Querschnitt des Dampferzeugergehäuses 1 angepaßt sind. Zwischen den beiden Schenkeln 6 und 7 entsteht dabei eine Rohrgasse 15, die im Zentrum des Dampferzeugers kreisförmig erweitert ist. Die Grenzen des Querschnittes des U-Rohrbündels 3 sind in der FIG 2 mit einer gestrichelten Linie 16 eingezeichnet.2 shows that the legs 6 and 7 of the U-tube bundle 3 are adapted to the cylindrical cross section of the steam generator housing 1. Between the two legs 6 and 7 there is a pipe lane 15 which is expanded in a circular manner in the center of the steam generator. The limits of the cross section of the U-tube bundle 3 are shown in FIG. 2 with a dashed line 16.

Der Rohrboden 8 hat eine Dicke von z.B. 500 mm. In der Mitte, also mit einem gleichmäßigen Abstand nach oben und unten, ist eine Abschlämmleitung 18 in Form einer Bohrung mit zwei Abschnitten 19 und 20 eingearbeitet. Die Abschnitte 19 und 20 liegen, wie die FIG 2 zeigt, auf einem Durchmesser, so daß vertikale Bohrungen 22, die die Abschnitte 19 und 20 mit dem oberhalb des Rohrbodens 8 gelegenen Raum verbinden, in die Rohrgasse 15 zwischen den beiden Schenkeln 6 und 7 des U-Rohrbündels 8 führen. Der Abstand A zwischen den Bohrungen 22 verringert sich vom Rand nach innen in zunehmendem Maße. Er beträgt im Bereich der kreisförmigen Erweiterung 16 nur etwa ein Drittel des Abstandes A zwischen den beiden äußersten Bohrungen.The tube sheet 8 has a thickness of, for example, 500 mm. In the middle, with an even distance up and down, a drain line 18 is incorporated in the form of a bore with two sections 19 and 20. The sections 19 and 20 lie, as shown in FIG 2, on a diameter, so that vertical bores 22, which connect the sections 19 and 20 with the space located above the tube sheet 8, into the tube lane 15 between the two legs 6 and 7 of the U-tube bundle 8. The distance A between the bores 22 decreases increasingly from the edge towards the inside. It is only about a third of the distance A between the two outermost bores in the area of the circular extension 16.

Die Abschnitte 19 und 20 führen zu Rohrstutzen 25, die an das Dampferzeugergehäuse 1 angeschweißt sind. Dort münden auch, wie auf der rechten Seite der FIG 1 dargestellt ist, kurze Horizontalbohrungen 26, von denen eine vertikale Anschlußbohrung 27 in einem Ringraum 28 zwischen der Gehäusewand 2 und einem das U-Rohrbündel 3 umgebenden zylindrischen Mantel 30. Die Anschlußstutzen 29 der horizontalen Abschlämmbohrungen 26 und die Abschnitte 19 und 20 sind an eine gemeinsame Abschlämmsammelleitung 32 angeschlossen, wie in FIG 2 angedeutet ist.The sections 19 and 20 lead to pipe sockets 25 which are welded to the steam generator housing 1. There also, as shown on the right-hand side of FIG. 1, short horizontal bores 26, of which a vertical connecting bore 27 in an annular space 28 between the housing wall 2 and a cylindrical jacket 30 surrounding the U-tube bundle 3. The connecting pieces 29 of the horizontal Blowdown bores 26 and sections 19 and 20 are connected to a common drainage line 32, as indicated in FIG.

Claims (6)

1. Steam generator having a housing which is elongated in the vertical direction and encloses a U-shaped tube bundle, the legs of which are contained with their tube ends in a horizontal tube plate, a cleansing line being provided at the tube plate, which line leads with vertical bores into the region of the tube bundle, characterised in that the cleansing line (18), in the form of a horizontal line (19, 20) extending over the width of the tube bundle, is incorporated into the tube plate (8) in such a way that the bores (22), which issue from said line, lead into an intermediate space (15) between the legs (6, 7) of the tube bundle (3).
2. Steam generator according to claim 1, characterised in that the horizontal line (18) comprises two sections (19, 20) which issue from opposing sides and which lie on one diameter.
3. Steam generator according to claim 1 or 2, characterised in that the spacing (A) of the vertical bores (22) diminishes from the edge towards the centre of the steam generator.
4. Steam generator according to claim 3, characterised in that the smallest spacing (A) between two adjacent vertical bores (22) amounts to at most half the greatest spacing.
5. Steam generator according to one of the claims 1 to 4 having a cylindrical jacket which encloses the tube bundle and which, with the housing, forms an annular space, characterised in that in addition to the horizontal cleansing line (18) there are provided further horizontal cleansing bores (26) which extend beneath the annular space (28) and which lead into the latter by means of a vertical bore (27).
6. Steam generator according to claim 5, characterised in that the cleansing bores (26) and the cleansing line (18) are connected to a common cleansing collector (32).
EP88118144A 1987-11-11 1988-10-31 Steam generator Expired - Lifetime EP0315870B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3738347 1987-11-11
DE3738347 1987-11-11

Publications (2)

Publication Number Publication Date
EP0315870A1 EP0315870A1 (en) 1989-05-17
EP0315870B1 true EP0315870B1 (en) 1990-09-12

Family

ID=6340292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118144A Expired - Lifetime EP0315870B1 (en) 1987-11-11 1988-10-31 Steam generator

Country Status (5)

Country Link
US (2) US4883036A (en)
EP (1) EP0315870B1 (en)
CA (1) CA1287778C (en)
DE (1) DE3860607D1 (en)
ES (1) ES2017781B3 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088451A (en) * 1990-04-09 1992-02-18 Westinghouse Electric Corp. Sludge removal system for removing sludge from heat exchangers
FR2690224B1 (en) * 1992-04-15 1994-06-03 Framatome Sa STEAM GENERATOR EQUIPPED WITH AN IMPROVED DEFLECTION AND PURGE DEVICE.
FR2692965A1 (en) * 1992-06-26 1993-12-31 Framatome Sa Steam generator with opening(s) in its tube plate for removing debris - from secondary water space above and connected to outside of pressure vessel by passage(s) within plate thickness
FR2713310B1 (en) * 1993-11-30 1996-01-12 Framatome Sa Steam generator fitted with an improved purge device on the secondary side of the tube plate.
BE1012128A3 (en) * 1998-08-21 2000-05-02 Blommaert Paul Combined steam boiler and water supply pre-heater of the type with a flare pipe known as a "combination boiler"
FR2799529B1 (en) * 1999-10-08 2002-01-18 Framatome Sa STEAM GENERATOR COMPRISING A DISTRIBUTION PLATE TO PROMOTE THE FLOW OF THE FEED WATER ABOVE THE TUBULAR PLATE
FR2858683B1 (en) * 2003-08-07 2005-11-04 Framatome Anp HEAT EXCHANGER, ESPECIALLY A CONVEX-BASED VAPOR GENERATOR
DE102006057734B4 (en) * 2006-12-07 2014-09-11 Uhde Gmbh Method and apparatus for the sludging of solids depositing on a tube sheet
US10973360B2 (en) 2015-03-25 2021-04-13 Illinois Tool Works Inc. Steam generator
US10357126B2 (en) * 2015-03-25 2019-07-23 Illinois Tool Works Inc. Steam generator

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH527390A (en) * 1972-04-07 1972-08-31 Sulzer Ag Evaporator
DE2262151A1 (en) * 1972-12-19 1974-07-04 Siemens Ag STEAM GENERATORS, IN PARTICULAR FOR PRESSURE WATER REACTORS
US3942481A (en) * 1974-09-18 1976-03-09 Westinghouse Electric Corporation Blowdown arrangement
US4037569A (en) * 1976-01-30 1977-07-26 Westinghouse Electric Corporation Flow distribution arrangement for a steam generator
DE2735450A1 (en) * 1977-08-05 1979-02-15 Kraftwerk Union Ag STEAM GENERATORS FOR NUCLEAR POWER PLANTS, IN PARTICULAR FOR PRESSURE WATER REACTORS
US4261300A (en) * 1978-12-26 1981-04-14 Combustion Engineering, Inc. Nuclear steam generator
FR2487043A1 (en) * 1980-07-18 1982-01-22 Framatome Sa DEVICE FOR DECOLMAGING AND RECOVERING SLUDGE ON THE TUBULAR PLATE OF A STEAM GENERATOR
FR2573179B1 (en) * 1984-11-13 1987-02-13 Framatome Sa SLUDGE REMOVAL DEVICE FOR CLEANING INSTALLATION OF THE TUBULAR PLATE OF A STEAM GENERATOR AND INSTALLATION COMPRISING SUCH A DEVICE
US4756770A (en) * 1986-02-11 1988-07-12 Arkansas Power And Light Company Water slap steam generator cleaning method

Also Published As

Publication number Publication date
ES2017781B3 (en) 1991-03-01
CA1287778C (en) 1991-08-20
DE3860607D1 (en) 1990-10-18
US4989550A (en) 1991-02-05
US4883036A (en) 1989-11-28
EP0315870A1 (en) 1989-05-17

Similar Documents

Publication Publication Date Title
EP0315870B1 (en) Steam generator
DE1751179A1 (en) Bracing of tubes arranged in a bundle
DE1401666A1 (en) Heat exchanger
DE2320084A1 (en) PIPE SUPPORT FOR HEAT EXCHANGER
DE3632982A1 (en) DEVICE FOR CLEANING THE INTERNAL AND EXTERNAL WALL OF STANDING OR HANGING TUBES
AT402551B (en) COMBUSTION PLANT
DE2615492A1 (en) Reactor safety valve immersed blowdown pipe - has two outlet groups producing phase displaced gas pulses
DE2224899A1 (en) Heat-exchanger - for steam raising in pipes surrounding hot gas pipes fed from an inlet chamber
DE453876C (en) Well filter made of individual filter baskets, one on top of the other and held together by long bolts with gravel filling
DE696325C (en) Cool box for shaft ovens, especially for blast furnaces
DE1426841A1 (en) Steam turbine plant
EP1022390A1 (en) Gutter
AT231117B (en) Burner system with pulsating combustion
CH492178A (en) Sectional boiler
DE1089336B (en) Horizontal filter well with a vertical shaft and a water collection chamber
DE114354C (en)
DE207288C (en)
DE223162C (en)
DE532407C (en) Feed water evaporator with a horizontal cylindrical evaporator body
DE207552C (en)
DE663985C (en) Standing fire box steam boiler with cross boiler tubes
DE2209046A1 (en) Nuclear reactor
DE1963948A1 (en) Nuclear plant steam producer
DE434286C (en) Heating device for absorbing radiant heat from furnaces of steam boilers u. like
DE2143716A1 (en) Water-cooled wall part for or in connection with an exhaust collection hood, in particular an exhaust gas collection hood

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR

17P Request for examination filed

Effective date: 19890608

17Q First examination report despatched

Effective date: 19900305

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR

REF Corresponds to:

Ref document number: 3860607

Country of ref document: DE

Date of ref document: 19901018

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19971218

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990803

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19991021

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19991022

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010629

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20011113