EP0058356B1 - Speisewasservorwärmteile eines Dampfkessels und Speisewasservorwärmer - Google Patents

Speisewasservorwärmteile eines Dampfkessels und Speisewasservorwärmer Download PDF

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Publication number
EP0058356B1
EP0058356B1 EP82100845A EP82100845A EP0058356B1 EP 0058356 B1 EP0058356 B1 EP 0058356B1 EP 82100845 A EP82100845 A EP 82100845A EP 82100845 A EP82100845 A EP 82100845A EP 0058356 B1 EP0058356 B1 EP 0058356B1
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EP
European Patent Office
Prior art keywords
steam
tubes
bundle
section
supplied
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Expired
Application number
EP82100845A
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English (en)
French (fr)
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EP0058356A1 (de
Inventor
Bernard Andrieux
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Delas Weir SA
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Delas Weir SA
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines

Definitions

  • the present invention relates to a feed water heater for a steam production boiler of an electrical energy production installation.
  • steam power plants include a steam condenser which receives and condenses the exhaust steam from the low pressure turbine and heaters placed on the boiler's feed water circuit, these being supplied by steam drawn from the turbine at different pressure levels.
  • the first low pressure cylindrical heaters are, most often, placed in the condenser sleeve which connects the exhaust pipes of the turbine to the condenser body which contains the tubular condensing bundle .
  • the heaters are installed horizontally inside the condenser sleeve and perpendicular to the axis of the turbine and are supplied with extracting steam by pipes directly connecting the turbine to said heaters, pipes which are also confined inside headlines.
  • the shape of the heaters generally cylindrical, and the arrangement of the withdrawal conduits supplying the heaters mean that the assembly remains relatively bulky and does not allow good passage of the exhaust steam from the turbine to the tube bundle of the condenser, in particular because of the draw-off lines constituting obstacles on the passage of this vapor and therefore increase the pressure losses.
  • the present invention aims to overcome these drawbacks and relates to a feed water heater element of a steam production boiler of an electrical energy production installation comprising an alternator driven by a turbine comprising at least one low pressure body, said heater element consisting of a bundle of tubes and being located inside a cuff connecting said low pressure body to the steam condenser located under this low pressure body, the tubes of said element of the heater being supplied with water from the condenser extraction circuit and the outer surface of the tubes being supplied with steam from a withdrawal of the low pressure body, the tube bundle being substantially horizontal and perpendicular to the axis of the turbine , the bundle of tubes having a narrow and elongated section the length of which is arranged substantially vertically, the bundle of tubes being enclosed in an env elope channeling the steam around the bundle and receiving the steam draw-off pipes, characterized in that said envelope has, in the connection region of the draw-off steam supply pipes, a section from which one of the sides deviates gradually from the bottom to the top of the corresponding side of
  • the supply of steam through the upper part of the envelope is carried out between said side of the envelope and the corresponding side of the narrow and elongated section of the tube bundle.
  • the invention also relates to a water heater characterized in that it comprises two separate water heater elements as above, placed at the same level and supplied with tapping steam of the same thermodynamic level at by means of pipes coming from a low pressure body with central intake and two symmetrical exhausts.
  • the two so-called separate water heater elements are supplied with withdrawal steam of a first thermodynamic level, a second heater being located outside of said sleeve and being supplied with steam. withdrawal of a second thermodynamic level, by pipes passing between the two said elements.
  • the withdrawal pipes connect said low pressure body to the upper face of said envelope in a substantially rectilinear manner, and the section of the envelope and tube bundle assembly is slightly inclined relative to the vertical so as to facilitate the condensate flow on the side opposite to the steam supply.
  • the water heater element comprises a bundle 1 of tubes which, in the assembly described, are tubes bent in a U shape and therefore whose inlet 2 and outlet 3 , as seen in Figure 3 are located on the same side, and a water box 4 realizing the separation between the inlet 2 and the outlet 3.
  • the section of the bundle 1 of tubes is narrow and elongated, substantially rectangular, the greatest length being placed vertically.
  • the tubes are supplied with water by the condenser extraction circuit and the outside wall of the tubes is supplied with withdrawal steam by withdrawal pipes.
  • the bundle 1 of tubes is enclosed in an envelope 6 which channels the vapor around the bundle of tubes. This envelope 6 does not have the same section over the entire length of the heater.
  • the latter In the region of the connection of the withdrawal pipes 5 with the casing, the latter has a section as shown by the reference 7 in FIG. 1, that is to say essentially such that one of the sides of the envelope, the one on the right in the figure, progressively departs from the bottom upwards, on the corresponding side of the section of the bundle 1 of tubes. Beyond the region of connection of the withdrawal pipes 5 with the casing 6, this has a section 8 which has the same shape, according to a slightly larger homothetic ratio, than the section of the bundle of tubes.
  • the admission of steam via the withdrawal pipes 5 takes place from above the part 7 of the envelope 6 between the sloping wall of this part 7 and the bundle 1 of tubes.
  • draw-off level S1 comprising two elements A and B similar to the element in FIG. 1. These elements A and B are supplied by draw-off pipes 5 coming from draw-offs similarly thermodynamic level. Each element A or B is supplied by two pipes 5 as shown in FIG. 4. These elements are arranged perpendicular to the axis 10 of the turbine.
  • the figures also show pipes 22 for drawing off a second thermodynamic level passing between the elements A and B but in this case, these pipes lead to a heater (not shown) placed outside the sleeve 15.
  • the very shape of the bundle, narrow and elongated, leaves a large space for the passage of exhaust vapor, all the more so since the bulge of the envelope 6 at 7 exists only over a part only of the length of the bundle. Furthermore, the internal supply of the withdrawal steam heater is excellent without it being necessary to extend this bulge 7 over the entire length.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Claims (6)

1. Speisewasser-Erwärmerelement (A, B) eines Dampferzeuger-Heizkessels in einer Anlage zur Erzeugung elektrischer Energie, die einen von einer Turbine mit mindestens einem Niederdruck-Teil (9) angetriebenen Wechselstromgenerator aufweist, wobei das aus einem Rohrbündel bestehende und im Inneren einer Manschette (15) angeordnete Erwärmerelement (A) den Niederdruck-Teil mit dem unter diesem angeordneten Dampfkondensator (14) verbindet und die Rohre dieses Erwärmerelements mit Wasser gespeist werden, das vom Entnahmekreis des Kondensators kommt, während die äußere Oberfläche der Rohre mit Dampf versorgt wird, der von einer Abzapfung am Niederdruck-Teil kommt, wobei das Rohrbündel (1) im wesentlichen waagerecht und senkrecht zur Achse (10) der Turbine verläuft und einen engen und länglichen Querschnitt besitzt, dessen Länge im wesentlichen senkrecht angeordnet ist, und wobei das Rohrbündel in eine Hülle (6) eingeschlossen ist, die den Dampf um das Bündel herumleitet und an Dampfabzapfleitungen (5) angeschlossen ist, dadurch gekennzeichnet, daß die Hülle im Bereich des Anschlusses der Abzapfdampf-Speiseleitungen einen Querschnitt (7) hat, von dem. eine Seite sich von unten nach oben zunehmend von einer der beiden im wesentlichen senkrechten Seiten des engen und länglichen Querschnitts des Rohrbündels (1) entfernt, während jenseits dieses Bereichs ein Querschnitt vorliegt, der, mit einem Freiraum für den Dampfdurchgang, dem Profil des Umrisses des Querschnitts des Rohrbündels folgt, wobei die Dampfeinspeisung von oberhalb der Hülle erfolgt.
2. Wasser-Erwärmer-Element nach Anspruch 1, dadurch gekennzeichnet, daß die Dampfeinspeisung durch den oberen Teil der Hülle (6) zwischen der genannten Seite der Hülle und der entsprechenden Seite des engen und länglichen Querschnitts des Bündels erfolgt.
3. Wasser-Erwärmer, dadurch gekennzeichnet, daß er zwei getrennte Wasser-Erwärmerelemente (A, B) gemäß Anspruch 2 aufweist, die in gleicher Höhe angeordnet sind und mit Abzapfdampf gleichen thermodynamischen Niveaus über Leitungen (5) gespeist werden, die von einem Niederdruck-Teil (9) mit zentraler Dampfzuführung und zwei symmetrischen Auslässen (11, 12) kommen.
4. Wasser-Erwärmer nach Anspruch 3, dadurch gekennzeichnet, daß die beiden getrennten Wasser-Erwärmerelemente (A, B) mit Abzapfdampf eines ersten thermodynamischen Niveaus gespeist werden, und daß ein zweiter Erwärmer, der außerhalb der Manschette (15) angeordnet ist, über Leitungen (22), die zwischen den beiden Elementen (A, B) hindurch verlaufen, mit einem Abzapfdampf eines zweiten thermodynamischen Niveaus gespeist werden.
5. Wasser-Erwärmer nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die Abzapfleitungen den Niederdruck-Teil mit der Oberseite der Hülle in im wesentlichen gerader Linie verbinden.
6. Wasser-Erwärmer nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der Querschnitt der Einheit Hülle und Rohrbündel leicht geneigt ist in Bezug auf die Senkrechte, um den Abfluß des Kondensats auf der der Dampfeinspeisung entgegengesetzten Seite zu erleichtern.
EP82100845A 1981-02-06 1982-02-05 Speisewasservorwärmteile eines Dampfkessels und Speisewasservorwärmer Expired EP0058356B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8102382 1981-02-06
FR8102382A FR2499677B1 (fr) 1981-02-06 1981-02-06 Element de rechauffeur d'eau d'alimentation d'une chaudiere et rechauffeur d'eau

Publications (2)

Publication Number Publication Date
EP0058356A1 EP0058356A1 (de) 1982-08-25
EP0058356B1 true EP0058356B1 (de) 1984-06-13

Family

ID=9254927

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Application Number Title Priority Date Filing Date
EP82100845A Expired EP0058356B1 (de) 1981-02-06 1982-02-05 Speisewasservorwärmteile eines Dampfkessels und Speisewasservorwärmer

Country Status (4)

Country Link
US (1) US4433546A (de)
EP (1) EP0058356B1 (de)
DE (1) DE3260224D1 (de)
FR (1) FR2499677B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651276B1 (fr) * 1989-08-28 1991-10-25 Alsthom Gec Condenseur en beton pour turbine a echappement axial et turbine munie d'un tel condenseur.
SE501307C2 (sv) * 1993-05-19 1995-01-09 Abb Stal Ab Sätt och anordning för fuktavskiljning vid lågtrycksturbin
DE10033691A1 (de) * 2000-07-11 2002-01-24 Alstom Power Nv Kondensatorhals zwischen einer Dampfturbine und einem Kondensator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR465428A (fr) * 1913-08-30 1914-04-16 Knorr Bremse Ag Réchauffeur pour eau d'alimentation de chaudière
DE325567C (de) * 1916-02-12 1920-09-15 Vickers Electrical Co Ltd Speisewasservorwaermer-Anordnung fuer Kondensationsdampfturbinen
DE549433C (de) * 1929-04-17 1932-04-27 Asea Ab Kondensationsdampfturbine mit zwei Kondensatoren und Vorwaermer
US3406749A (en) * 1967-02-02 1968-10-22 Ingersoll Rand Co Steam manifold for condensers
DE1813939C3 (de) * 1968-12-11 1975-01-23 Gutehoffnungshuette Sterkrade Ag, 4200 Oberhausen Liegender Speisewasservorwärmer
DE2358349A1 (de) * 1973-04-13 1974-10-31 Hamon Sobelco Sa Zweistufiger niederdruckvorwaermer

Also Published As

Publication number Publication date
FR2499677A1 (fr) 1982-08-13
FR2499677B1 (fr) 1985-09-27
US4433546A (en) 1984-02-28
DE3260224D1 (en) 1984-07-19
EP0058356A1 (de) 1982-08-25

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