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EP0038748B1 - Dampf-Wasserabscheider am Verdampfungsraumausgang eines Dampferzeugers - Google Patents

Dampf-Wasserabscheider am Verdampfungsraumausgang eines Dampferzeugers Download PDF

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Publication number
EP0038748B1
EP0038748B1 EP81400599A EP81400599A EP0038748B1 EP 0038748 B1 EP0038748 B1 EP 0038748B1 EP 81400599 A EP81400599 A EP 81400599A EP 81400599 A EP81400599 A EP 81400599A EP 0038748 B1 EP0038748 B1 EP 0038748B1
Authority
EP
European Patent Office
Prior art keywords
steam generator
cyclones
steam
water
sub
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
Application number
EP81400599A
Other languages
English (en)
French (fr)
Other versions
EP0038748A1 (de
Inventor
Jean-Claude Yazidjian
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.)
Areva NP SAS
Original Assignee
Framatome SA
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 Framatome SA filed Critical Framatome SA
Publication of EP0038748A1 publication Critical patent/EP0038748A1/de
Application granted granted Critical
Publication of EP0038748B1 publication Critical patent/EP0038748B1/de
Expired legal-status Critical Current

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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
    • F22B37/26—Steam-separating arrangements
    • F22B37/32—Steam-separating arrangements using centrifugal force
    • F22B37/327—Steam-separating arrangements using centrifugal force specially adapted for steam generators of nuclear power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/023—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes for nuclear reactors, as long as they are not classified according to a specified heating fluid, in another group
    • F22B1/025—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes for nuclear reactors, as long as they are not classified according to a specified heating fluid, in another group with vertical U shaped tubes carried on a horizontal tube sheet

Definitions

  • the invention relates to a device for separating water and steam at the outlet of a recirculating steam generator, such as a steam generator used in a nuclear power plant.
  • the steam generators used in nuclear power plants for example in pressurized water nuclear power plants, generally consist of an envelope resistant to cylindrical pressure of great height inside which is disposed a secondary enclosure covering a traversed tubular bundle by pressurized water which constitutes the exchange fluid bringing the heat from the reactor core to the steam generator, for the production of steam.
  • Food water is brought into the steam generator above the secondary enclosure or vaporization enclosure, circulates downwards outside this enclosure before entering the vaporization enclosure through its lower part to enter in contact with the tube bundle and be vaporized.
  • These water and vapor separation devices generally comprise a first stage disposed at the outlet of the vaporization enclosure constituted by vertical cylindrical tubes enclosing deflectors making it possible to give a helical movement to the vapor inside the tubes when this steam loaded with water leaves the vaporization enclosure, so that the water present in the vapor is separated by centrifugal force and reincorporated into the potable water supplied in the steam generator above the vaporization enclosure .
  • the cylindrical spiral deflector tubes also called cyclones, allow the separation of most of the water entrained by the steam and the recirculation of this water with the drinking water brought by a torus placed at a level slightly below the level cyclones.
  • the level of drinking water in the steam generator is such that the feed toroid is completely submerged in drinking water, while the cyclones emerge above this drinking water.
  • a decrease in the size of the cyclone separators is accompanied by an increase in their number.
  • approximately 120 to 140 separators with a diameter of 200 mm are required.
  • these cyclone separators must then be placed at the end of a very high vertical inlet duct connecting the separator to the vaporization enclosure.
  • the object of the invention is therefore to propose a device for separating water and steam at the outlet of the vaporization enclosure of a recirculating steam generator, such as a generator used in a nuclear power plant, consisting by a set of vertical cylindrical tubes inside which are arranged deflector elements giving the steam a helical path allowing the separation of water by centrifugal force, when the steam loaded with water before its exit at the top of the generator, runs through these tubes arranged above the vaporization enclosure, tion placed in the pressurized envelope of the steam generator, inside which the vaporization of water takes place, this separation device having to allow an easy construction of the steam generator, better accessibility to the separation devices for their repair or maintenance and to improve the mechanical strength of the assembly constituted by the vapor separator tubes.
  • a recirculating steam generator such as a generator used in a nuclear power plant
  • cylindrical or cyclone tubes are grouped by sub-assemblies, each of the cyclones of a sub-assembly being fixed to the upper part of a support structure common to all the cyclones of the sub-assembly comprising from bottom to top, a tubular column fixed on the upper part of the vaporization enclosure, extending it upwards and in communication by its internal part with the interior of this enclosure and a structure in the form of an upwardly flared enclosure in communication on the one hand with the internal part of the column and on the other hand with the cyclones attached to its upper part, the flared enclosure and the cyclones of the corresponding sub-assembly, constituting a unitary module of the separation device.
  • FIG 1 there is shown a steam generator whose external envelope 1 resistant: the pressure contained in the lower portion of smaller diameter, a tubular beam 2 having a plurality of bent tubes through the, water-pressurized introduced into the steam generator under the tube plate 3 by an inlet pipe 4, the pressurized water passing through the tubes of the tube bundle then returning under the tube plate 3 to exit the steam generator through the pipe 5.
  • the tube bundle 2 is surrounded up in the vicinity of its lower part by a second casing 6 constituantl, vaporization enclosure within which the, feed water in contact with the tube bundle traversed by, pressurized water temperature harute coming from the reactor core, gradually vaporizes, rising inside the vaporization enclosure 6 to its upper end, at the base of the steam dome with a larger diameter than the lower part of the steam generator .
  • a pipe 7 allowing the outlet of the steam to the turbine.
  • a feed water supply device not shown makes it possible to maintain the level 8 of the feed water in the steam generator at a certain distance above the tube bundle 2, this distance being of the order of 2 to 3 meters, and below the cyclones 10 constituted by vertical tubes inside which are arranged helical deflectors allowing a swirling path to be carried out (with steam brought from the upper part of the vaporization enclosure 6 to to these cyclones 10 by tubular columns 11 of small diameter and great height.
  • the tubular columns 11 are rigidly fixed to the top of the vaporization enclosure 6 and put in communication the cylindrical tubes 10 constituting the cyclones with the internal part of the envelope 6 inside of which the feed water is vaporized.
  • FIG. 2 there is shown a steam generator where the different elements identical to the elements shown in FIG. 1 bear the same references.
  • cyclone separators 10 are in this embodiment corresponding to the invention fixed to the upper part of an e-nsemble comprising a column 14 fixed to the upper part of the vaporization enclosure 6 and a structure 15 of flared upward shape which will be described in more detail with reference to Figures 3 and 4.
  • the cyclone separators 10 are grouped by sub-assemblies comprising 7 units fixed to the upper part of a structure 15 constituted by an enclosure flared upwards, the section of which by a plane of cross section is hexagonal.
  • the tubes constituting the separators are fixed by welding to the upper part of these enclosures 15 so that the internal volume of the enclosure 15 communicates with the internal bore of the tubes 10 enclosing the deflector devices making it possible to give a helical path to the vapor .
  • Each enclosure 15 to which 7 cyclone separators are fixed constitutes a module which can be manufactured separately before mounting the steam generator.
  • tubular columns 14 are arranged at the upper part of the vaporization enclosure 6 so that their internal bore is in communication with the internal volume of this secondary enclosure 6.
  • each of the chambers 15 is connected with the upper part of a column 14.
  • the set of columns 14 can be kept inside the steam generator by a holding frame 18 fixed to the columns at their upper part.
  • each of the columns 14 is on the other hand less than the sum of the cross sections of the tubes 10, so that it is possible to provide very good filling of the cross section of the steam generator with cyclone separators while providing sufficient space between the columns 14 for supporting the modules, making it possible, for example, to place the water supply toroid 19 between these columns.
  • This level 8 has been represented in FIG. 3.
  • the reduction in the diameter of the columns increases the section available for the recirculation water in the steam generator so that the total mass of water in the steam generator is increased which is beneficial for the behavior of this steam generator in the event of an accident.
  • the level measurements are more easily interpretable since the disturbing effects of speed on the pressure taps are reduced, allowing the level to be controlled in the steam generator.
  • the main advantages of the device according to the invention are to make it possible to increase the performance of the steam generator without modifying its dimensions, to facilitate the construction of the steam generator, by virtue of the modular form of the separation devices. water and steam and to allow better accessibility in the space between the top of the vaporization enclosure and the modules comprising the cyclone separators.
  • the section of these modules can in particular be different from a hexagonal section and the number of separators associated with each of the modules can be different from 7.
  • the position and the distribution of the columns at the upper part of the vaporization enclosure 6 can be entirely different from that which has been shown.
  • the cyclone separators constituting the device for separating water and steam can be associated with a secondary separation device different from a baffle dryer, as in the example which has been described.
  • the device according to the invention applies not only in the case of steam generators of pressurized water nuclear reactors but also in the case of other generators using a set of cyclones arranged vertically above an enclosure vaporization, for the primary separation of the vapor and the water entrained by this vapor.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Cyclones (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Claims (5)

1. Vorrichtung zum Abscheiden von Wasser und Dampf am Ausgang eines Verdampfungsbehälters (6) von einem Dampfumlauferzeuger wie ein in einem Atomkraftwerk eingesetzten Dampferzeuger, bestehend aus einer Gruppe senkrechter Zylinderrohre, die innen Ablenkbleche (10) wie Drällabscheider aufweisen, wodurch der Dampf ein schraubenförmiger Weg durchläuft, um somit das Wasser durch die Fliehkraft abzuscheiden, wenn der mit Wasser beladene Dampf vor seinem Austritt aus dem Generatoroberteil, durch diese über dem Verdampfungsbehälter (6) angeordneten Rohre durchströmt, wobei der Verdampfungsbehälter (6), in welchem die Wasserverdampfung stattfindet, in dem druckfesten Außenmantel (1) des Dampferzeugers angeordnet ist, dadurch gekennzeichnet, daß die Zyklone (10) in Untergruppen zusammengefaßt sind, wobei die jeweiligen Zyklone einer Untergruppe am Oberteil einer sämtlichen Zyklonen der Untergruppe gemeinsamen Abstützkonstruktion befestigt sind, die von unten nach oben hin eine an dem Oberteil des Verdampfungsbehälters (6) senkrecht befestigte, dieser nach oben hin verlängernde und mit ihrem Innenteil mit dem Behälterinnenraum in Verbindung stehende Rohrsäule (14) aufweist sowie eine nach oben hin ausgeweitete Mantelstruktur (15), die einerseits mit dem Inneren der Rohrsäule (14) und anderseits mit den an seinem Oberteil befestigten Zyklonen (10) in Verbindung steht, wobei die ausgeweitete Mantelstruktur (15) und die Zyklone (10) der entsprechenden Untergruppe ein Einheitsmodul der Abscheidevorrichtung bilden.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Querschnitt der Rohrsäulen (14) der Abstützkonstruktionen der Untergruppen der Zyklone (10) kleiner als die Summe der Querschnitte der rohrförmigen Zyklone (10) der entsprechenden Untergruppe ist.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Wasserversorgungseinrichtung des Dampferzeugers aus einer zwischen einigen Stützsäulen (14) der Zyklonabscheider (10) angeordneten torischen Leitung (19) besteht.
4. Vorrichtung nach einem der Ansprüche 1, 2 und 3, dadurch gekennzeichnet, daß die ausgeweiteten Mantelstrukturen (15), auf denen die Zyklonabscheider (10) befestigt sind, einen Sechskantquerschnitt durch eine Ebene gerader Querschnittsfläche des Dampferzeugers aufweisen, wobei die Zyklonabscheider im Inneren des geraden Querschnittes des Dampferzeugers gemäß einem Sechskantmaschennetz angeordnet sind.
5. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß jede Untergruppe 7 Zyklonabscheider (10) umfaßt.
EP81400599A 1980-04-18 1981-04-15 Dampf-Wasserabscheider am Verdampfungsraumausgang eines Dampferzeugers Expired EP0038748B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8008734 1980-04-18
FR8008734A FR2480905A1 (fr) 1980-04-18 1980-04-18 Dispositif de separation d'eau et de vapeur a la sortie d'enceinte de vaporisation d'un generateur de vapeur

Publications (2)

Publication Number Publication Date
EP0038748A1 EP0038748A1 (de) 1981-10-28
EP0038748B1 true EP0038748B1 (de) 1983-01-19

Family

ID=9241072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400599A Expired EP0038748B1 (de) 1980-04-18 1981-04-15 Dampf-Wasserabscheider am Verdampfungsraumausgang eines Dampferzeugers

Country Status (13)

Country Link
US (1) US4344387A (de)
EP (1) EP0038748B1 (de)
JP (1) JPS56165803A (de)
BR (1) BR8102231A (de)
CA (1) CA1162494A (de)
DE (1) DE3160033D1 (de)
EG (1) EG15350A (de)
ES (1) ES8600490A1 (de)
FR (1) FR2480905A1 (de)
GR (1) GR74454B (de)
PT (1) PT72829B (de)
YU (1) YU90981A (de)
ZA (1) ZA812371B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5249551A (en) * 1991-04-09 1993-10-05 Kirkpatrick William J Steam generation system mass and feedwater control system
FR2707733B1 (fr) * 1993-07-12 1995-09-01 Framatome Sa Générateur de vapeur à cyclones démontables.
GB2356242A (en) * 1999-10-01 2001-05-16 David Oakland Steam accumulator with centrifugal separators
US8262761B2 (en) * 2009-04-21 2012-09-11 Mann + Hummel Gmbh Modular cyclone precleaner system and method
CN106895387B (zh) * 2015-12-18 2019-08-13 核动力运行研究所 一种蒸汽干燥器
FR3100920B1 (fr) * 2019-09-16 2021-10-01 Framatome Sa Méthode et ensemble de réparation d’un générateur de vapeur d’un réacteur nucléaire

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB937549A (en) * 1961-08-29 1963-09-25 Clarke Chapman Ltd Improvements in cyclonic fluid separators
US3614863A (en) * 1968-12-31 1971-10-26 Combustion Eng Centrifugal separator having perforated can wall
US3735569A (en) * 1971-09-07 1973-05-29 Combustion Eng Water-steam separator
US3896770A (en) * 1972-07-24 1975-07-29 Westinghouse Electric Corp Steam generator with split flow preheater
US3906905A (en) * 1974-08-20 1975-09-23 Commissariat Energie Atomique Steam generator
GB1533482A (en) * 1977-01-06 1978-11-29 Clarke Chapman Ltd Method and apparatus for steam/water separation

Also Published As

Publication number Publication date
PT72829A (fr) 1981-05-01
US4344387A (en) 1982-08-17
DE3160033D1 (en) 1983-02-24
BR8102231A (pt) 1981-11-24
FR2480905A1 (fr) 1981-10-23
JPS56165803A (en) 1981-12-19
ES501285A0 (es) 1985-10-01
PT72829B (fr) 1982-03-29
EG15350A (en) 1986-06-30
EP0038748A1 (de) 1981-10-28
GR74454B (de) 1984-06-28
YU90981A (en) 1983-12-31
ES8600490A1 (es) 1985-10-01
ZA812371B (en) 1982-04-28
FR2480905B1 (de) 1982-03-19
CA1162494A (fr) 1984-02-21

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