EP0068958A1 - Dampferzeuger mit einem dynamischen Dampfwasserableiter - Google Patents

Dampferzeuger mit einem dynamischen Dampfwasserableiter Download PDF

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Publication number
EP0068958A1
EP0068958A1 EP82401064A EP82401064A EP0068958A1 EP 0068958 A1 EP0068958 A1 EP 0068958A1 EP 82401064 A EP82401064 A EP 82401064A EP 82401064 A EP82401064 A EP 82401064A EP 0068958 A1 EP0068958 A1 EP 0068958A1
Authority
EP
European Patent Office
Prior art keywords
steam
water
enclosure
steam generator
drying structure
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.)
Granted
Application number
EP82401064A
Other languages
English (en)
French (fr)
Other versions
EP0068958B1 (de
Inventor
Jean Edmond Chaix
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0068958A1 publication Critical patent/EP0068958A1/de
Application granted granted Critical
Publication of EP0068958B1 publication Critical patent/EP0068958B1/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
    • F22B37/268—Steam-separating arrangements 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
    • 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

Definitions

  • the present invention relates to a steam generator more particularly intended for use in pressurized water nuclear reactors and provided with a dynamic purge device facilitating the evacuation of the water separated from the steam in the dryer of the generator.
  • FIG. 1 represents a steam generator of the type currently used in pressurized water reactors.
  • the generator bearing the general reference 1, is constituted by a sealed cylindrical enclosure 2 surrounding a set of U-shaped tubes referenced 4 in which the primary liquid circulates.
  • the tubes 4 are fixed by their lower part to a tube plate 6 and communicate on the one hand with an intake chamber 8 through which the primary fluid arrives. hot and an evacuation chamber 10 allowing the cooled primary liquid to return to the reactor.
  • a cylindrical envelope 12 surrounds all of the tubes 4 and defines with the internal wall of the enclosure 2 an annular passage 14 for the circulation of the secondary liquid.
  • the cylindrical envelope 12 has at its upper part a cover 18 in which are formed several passages such as 20, each being provided with a device for separation by centrifugation of the water entrained with the steam. This, leaving the device 22 still contains a certain amount of water which must be removed before the steam reaches the turbine of the alternator.
  • the upper part of the generator is provided with a drying structure such as 24 and generally comprising passages provided with baffles on which the drops of water are deposited and fall back into the generator through discharge conduits such as 26.
  • the generator represented in FIG. 1 comprises two superimposed drying structures 24 and 25 communicating with the lower part of the generator by discharge conduits 26 and 27 respectively. It is also possible to provide a central manifold 28 whose action completes that of the discharge conduits 26 and 27. It can also be seen in FIG. 1 that the free surface of the secondary liquid outside the envelope 12 reaches the level of the centrifuge device 22 and that the free ends of the conduits 26 and 27 and of the manifold 28 are below this surface. Since the drying structures 24 and 25 cause a pressure drop in the steam circuit, there is established in the evacuation conduits a height of water called “guard height" such that the level difference between the free surface of the liquid in the evacuation conduits and inside the enclosure 2 corresponds approximately to the pressure drop across the structures 24 and 25.
  • guard height a height of water
  • the object of the present invention is precisely a steam generator in which this drawback is eliminated by a device which makes it unnecessary to maintain a headroom in the evacuation pipes.
  • the steam generator object of the invention comprising inside a sealed enclosure of vertical axis a plurality of U-shaped tubes in which circulates a primary liquid and on the wall external of which a secondary liquid flows, a cylindrical envelope surrounding said tubes and delimiting with the internal wall of said enclosure an annular passage in communication at its lower part with the internal space of said envelope, the latter being closed at its part upper by a cover itself surmounted by at least one device for separating steam by centrifugation, a steam drying assembly at the upper part of said enclosure, this assembly comprising at least one steam drying structure surrounding the axis of said enclosure, each drying structure communicating at its lower part with at least one discharge conduit for the evacuation of water separated from the vapor, is c characterized in that each discharge conduit is in communication with a dynamic purge device capable of creating a vacuum in order to suck up the water collected in said drying structure.
  • the device capable of creating a vacuum comprises a pipe, one end of which is connected to the secondary liquid supply circuit and the other end of which is in the form of a injector similar to that of a water pump, is located inside a conduit used to evacuate the water collected in the discharge structure.
  • each discharge conduit opens into an annular conduit surrounding the axis of the enclosure, this annular conduit communicating with at least one evacuation conduit itself provided with a device dynamic purge capable of creating a depression.
  • FIG. 2 shows the upper part of a steam generator similar to that of Figure 1 where we recognize the secondary water inlet 16 and the cylindrical envelope 12 closed at its upper part by a cover 18. On the latter are arranged several cylindrical passages such as 20 provided with a device 22 for separating by centrifugation the water entrained by steam. The water is discharged through a passage formed between the cylinder 20 and a sleeve 23 surrounding the latter while the vapor, which still contains a few water droplets, enters the upper part of the enclosure and passes through drying structures. In the example shown here there are two superimposed drying structures 24 and 25 having a shape of revolution around the axis of the enclosure 2.
  • the structures 24 and 25 comprise a plurality of vertical passages provided with numerous baffles on which '' deposit water droplets entrained by steam. The latter is then discharged through an orifice 30 formed in the upper part of the generator while the water droplets fall to the lower part of the dryers 24 and 25 and pass through the discharge conduits 26 and 27.
  • the discharge conduits such as 26 and 27 all open into an annular conduit 32 surrounding the axis of the enclosure. Under the annular pipe 32, and in communication therewith, there is a discharge pipe 34 which is provided with a device 36 capable of creating a vacuum inside the pipe 34 and therefore of the others. conduits 26, 27 and 32.
  • the device 36 firstly comprises a conduit 38 connected to the secondary water supply circuit and emerging inside the conduit 34 by an injector or nozzle 39 similar to that of a water pump.
  • the part of the pipe 34 surrounding the injector 39 has a convergent shape, so that the water injected by the nozzle 39 creates a vacuum and sucks the water droplets contained both in the pipe 34 and in the annular conduit 32 or the discharge conduits 26 and 27.
  • the suction in the evacuation conduits it is no longer necessary to maintain a guard height in these and one can reduce the total height of the generator.
  • the device according to the invention has numerous advantages, the main one of which is being able to reduce the height of the generator by eliminating the guard height to be maintained in the discharge piping.
  • the possible reduction of the total height can be of the order of a meter, which results in an appreciable saving in mate rials and therefore a lowering of the cost of installation.
  • the fact of having a permanent suction ensures faster and more efficient evacuation of the water droplets separated from the vapor in the dryers 24 and 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Drying Of Solid Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Cyclones (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Separating Particles In Gases By Inertia (AREA)
EP82401064A 1981-06-16 1982-06-11 Dampferzeuger mit einem dynamischen Dampfwasserableiter Expired EP0068958B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111833A FR2507742A1 (fr) 1981-06-16 1981-06-16 Generateur de vapeur muni d'un dispositif de purge dynamique
FR8111833 1981-06-16

Publications (2)

Publication Number Publication Date
EP0068958A1 true EP0068958A1 (de) 1983-01-05
EP0068958B1 EP0068958B1 (de) 1984-07-25

Family

ID=9259574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401064A Expired EP0068958B1 (de) 1981-06-16 1982-06-11 Dampferzeuger mit einem dynamischen Dampfwasserableiter

Country Status (9)

Country Link
US (1) US4522156A (de)
EP (1) EP0068958B1 (de)
JP (1) JPS5813901A (de)
KR (1) KR880001502B1 (de)
CA (1) CA1216481A (de)
DE (1) DE3260463D1 (de)
ES (1) ES8401601A1 (de)
FR (1) FR2507742A1 (de)
ZA (1) ZA824122B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250319A1 (de) * 1986-06-18 1987-12-23 Commissariat A L'energie Atomique Dampferzeuger mit verbesserten Trocknungsmitteln

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910002216B1 (ko) * 1985-03-29 1991-04-08 가부시끼가이샤 도시바 습분분리 재열장치
FI73063C (fi) * 1986-02-05 1987-08-10 Santasalo Sohlberg Ab Oy Generator foer ren aonga.
FR2616883B1 (fr) * 1987-06-18 1990-03-30 Framatome Sa Bac d'epuration d'eau de generateur de vapeur
US5249551A (en) * 1991-04-09 1993-10-05 Kirkpatrick William J Steam generation system mass and feedwater control system
JP2526446B2 (ja) * 1991-08-11 1996-08-21 三浦工業株式会社 クリ―ン蒸気の製造装置
FR2705759B1 (fr) * 1993-05-27 1995-07-07 Framatome Sa Générateur de vapeur équipé d'un dispositif de piégeage de corps migrants.
WO2008026325A1 (fr) * 2006-08-28 2008-03-06 Mitsubishi Heavy Industries, Ltd. Séparateur d'humidité
US20090274261A1 (en) * 2008-04-30 2009-11-05 Defilippis Michael S Steam dryer
CN103557512B (zh) * 2013-10-17 2015-03-11 中国核动力研究设计院 汽水分离器及蒸汽发生器模拟体
CN110617470A (zh) * 2019-10-12 2019-12-27 清华大学 过热蒸汽生产***及过热蒸汽生产方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906905A (en) * 1974-08-20 1975-09-23 Commissariat Energie Atomique Steam generator
FR2275731A1 (fr) * 1974-06-21 1976-01-16 Westinghouse Electric Corp Generateur de vapeur comprenant un separateur d'humidite

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1347938A (fr) * 1961-12-11 1964-01-04 Foster Wheeler Ltd échangeurs de chaleur perfectionnés
US3437077A (en) * 1966-01-21 1969-04-08 Babcock & Wilcox Co Once-through vapor generator
US3804069A (en) * 1972-02-09 1974-04-16 Westinghouse Electric Corp Steam generator
FR2275240A1 (fr) * 1974-06-21 1976-01-16 Stein Industrie Dispositif de pre-separation des gouttes d'eau d'un ecoulement biphasique
US4068627A (en) * 1976-01-06 1978-01-17 Westinghouse Electric Corporation Steam generator with vertical tubesheets
FR2394750A1 (fr) * 1977-06-15 1979-01-12 Commissariat Energie Atomique Generateur de vapeur
US4261298A (en) * 1978-06-07 1981-04-14 The Babcock & Wilcox Company Vapor generating technique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2275731A1 (fr) * 1974-06-21 1976-01-16 Westinghouse Electric Corp Generateur de vapeur comprenant un separateur d'humidite
US3906905A (en) * 1974-08-20 1975-09-23 Commissariat Energie Atomique Steam generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250319A1 (de) * 1986-06-18 1987-12-23 Commissariat A L'energie Atomique Dampferzeuger mit verbesserten Trocknungsmitteln
FR2600403A1 (fr) * 1986-06-18 1987-12-24 Commissariat Energie Atomique Generateur de vapeur a moyens de sechage perfectionnes

Also Published As

Publication number Publication date
FR2507742B1 (de) 1984-12-28
CA1216481A (en) 1987-01-13
ES513113A0 (es) 1983-12-16
DE3260463D1 (en) 1984-08-30
JPS5813901A (ja) 1983-01-26
FR2507742A1 (fr) 1982-12-17
US4522156A (en) 1985-06-11
KR840000762A (ko) 1984-02-27
EP0068958B1 (de) 1984-07-25
KR880001502B1 (ko) 1988-08-16
ZA824122B (en) 1983-05-25
ES8401601A1 (es) 1983-12-16
JPS6367081B2 (de) 1988-12-23

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