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EP0309361B1 - Distributeur de fluide dans un réservoir sous pression empêchant une stratification thermique - Google Patents

Distributeur de fluide dans un réservoir sous pression empêchant une stratification thermique Download PDF

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Publication number
EP0309361B1
EP0309361B1 EP88402403A EP88402403A EP0309361B1 EP 0309361 B1 EP0309361 B1 EP 0309361B1 EP 88402403 A EP88402403 A EP 88402403A EP 88402403 A EP88402403 A EP 88402403A EP 0309361 B1 EP0309361 B1 EP 0309361B1
Authority
EP
European Patent Office
Prior art keywords
tubes
pipe
water
fluid distributor
supply pipe
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
EP88402403A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0309361A1 (fr
Inventor
Patrick Sundheimer
Yves Pascal
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 EP0309361A1 publication Critical patent/EP0309361A1/fr
Application granted granted Critical
Publication of EP0309361B1 publication Critical patent/EP0309361B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
    • 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
    • F22B37/22—Drums; Headers; Accessories therefor
    • F22B37/228—Headers for distributing feedwater into steam generator vessels; Accessories therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85938—Non-valved flow dividers

Definitions

  • the present invention relates to a fluid distributor in a pressure tank according to the preamble of claim 1, preventing thermal stratification in this distributor between two layers of immiscible fluids at different temperatures. It can in particular be applied to the water supply device for steam generators of nuclear power plants.
  • the water constituting the secondary fluid in the heat exchangers of nuclear power plants is vaporized in a steam generator, the wall of which is pierced by a water supply pipe.
  • This pipe is terminated by a horizontal toroidal distributor internally running along the cylindrical wall of the steam generator.
  • the interior of the steam generator and the interior of the torus communicate using distribution tubes crossing the wall of the latter and planted on its upper generator.
  • these tubes are in the form of a butt, that is to say that their end external to the torus is terminated by an arc of a circle oriented radially with respect to the torus.
  • the other end of the tubes penetrates inside the torus, possibly as far as the middle of its section, or is simply flush with the interior surface of its wall.
  • This latter construction is in particular compulsory if the torus is completed by a tubular connecting section which is fitted into the supply pipe during assembly.
  • Such distributors meet several requirements: to promote a uniform flow of water in the steam generator, to subject the supply water to pressure drops limiting the violence of its flow, and above all, in the event of a lowering of the level of the liquid in the steam generator, avoid dewatering the pipes which would then lead to the creation of a water hammer.
  • the invention eliminates these drawbacks and consists in promoting the flow of water out of the distribution torus in the areas closest to the supply pipe where the hot water is liable to accumulate. In those regimes where the cold water flow which feeds the toroid is low, the invention makes it possible to limit the pressure losses produced by the passage of the distribution tubes mainly in areas where hot water tends to accumulate. This gives a much more balanced flow in the different tubes and the prospect of finally removing all the hot water. It is obvious that the invention does not only apply to a distribution device comprising a single supply pipe connected to a toroid, but that it can on the contrary apply to any equivalent device comprising a substantially horizontal pipe in the steam generator provided with distribution tubes passing through it by its upper generator.
  • the invention relates to a fluid distributor in a pressure tank comprising a fluid supply pipe entering the tank and terminated by a substantially horizontal tubular distributor part communicating with the interior of the tank by tubes passing through its upper generatrix. and terminated by an open end remote from the dispensing part, characterized in that the tubes have a wall traversed by at least one opening outside the dispensing part between the dispensing part and the open end.
  • the invention can be implemented in two main aspects: the wall of the tubes can be notched by holes, or else, if these tubes are in the butt, the underside thereof can be notched.
  • the notches of the tubes are at increasing altitude away from the tubing of drinking water.
  • the invention can finally be implemented if the dispensing part is provided with holes or notches at its upper generatrix between the tubes and the pipe power supply.
  • FIGS 1 and 1a first show a pipe 1 seen in section, which can be toroidal and which is inside a steam generator, the envelope of which is traversed by a supply pipe which supplies line 1 with water.
  • Line 1 is horizontal and provided with distributor tubes 2, only one of which is shown here, generally vertical and passing through the wall of line 1 at its upper generatrix. Part of the water flowing in the pipe 1 therefore passes through the distributor tube 2 to end up inside the steam generator.
  • the distributor tube 2 shown here can be broken down into three parts: a rectilinear middle part 3, welded to the pipe 1 and passing through it, flush with a first end on the internal surface 1i of the wall of the pipe 1 and s' extending out of its outer surface 1e into the interior of the steam generator; a first end part 4 connected to the first end of the middle part 3 which it extends by extending into the pipe 1; and a second end portion 5 connected to the other end of the middle portion 3, therefore located outside of the pipe 1 and in the form of a semicircle or stick oriented radially with respect to the pipe 1.
  • the first end portion 4 is terminated at a bevel as can best be seen in FIG. 1a which is a side view of FIG. 1.
  • the direction of flow of the water in the pipe 1 is indicated by the arrow Ec; it can be seen that the bevel arrangement makes it possible to introduce part of the water streams into the distribution tube 2 and thus to promote the flow by the latter.
  • the upper part of the bevel, oriented upstream of the flow Ec is approximately three quarters of the height of the pipe 1 and the lower part of the bevel, downstream of the flow Ec, is approximately a quarter of this height.
  • distribution tubes can be constructed in many different ways. In particular, their proportions can be largely modified, especially with regard to the extreme parts 4 and 5 which are not compulsory and which can therefore be omitted entirely.
  • the distribution tube 2 is notched outside the pipe 1 by one or more bores.
  • two holes were drilled, a lower hole 6 on the middle part 3 and an upper hole 7 on the second end part or butt 5.
  • the number and arrangement of these holes can be varied, and their angular arrangement on the circumference of the distribution tube 2 is indifferent.
  • this load is sufficient to be able to gradually evacuate the hot water through the holes 6 and 7, so that the cold water ends up filling the pipe 1 to penetrate the distribution tube 2 and flow through these same holes 6 and 7 in turn according to arrows E2.
  • the interface between hot water and cold water in line 1 is thus gradually eliminated, so that no abnormal stress concentration appears along its wall.
  • FIG. 2 Another embodiment of the invention, which can be envisaged on supply tubes 2 provided with a stock 5, is illustrated in FIG. 2.
  • the lower surface 5i (FIG. 1) of the stock 5 has been removed over its entire length, that is to say that the section of the butt 5 is now an open tube in its lower part.
  • FIG. 3 represents a complete supply device comprising a pipe 1 of toroidal shape connected to a feed pipe 10 passing through the envelope 11 of the steam generator to which it is welded.
  • the pipe 1 can be welded to the supply pipe 10 or else provided with a fitting fitted in this supply pipe 10.
  • the feed water therefore enters the pipe 1 and flows in two symmetrical flows between the two left and right branches of the torus.
  • the flows pass successively near several distribution tubes 2a, 2b, 2c, etc. from upstream to downstream.
  • the load of cold water decreases appreciably upstream in the case of a low flow, it is essential to favor the flow out of line 1 especially in the upstream parts by reducing there more strongly the pressure losses produced by the crossing, over their entire length, of the distribution tubes 2. This is why the holes 6a, 6b, 6c, etc ... operated on the tubes of corresponding distribution 2a, 2b, 2c, etc ... are found at decreasing heights on the tubes located upstream.
  • the invention therefore makes it possible to establish in the pipe 1 a flow and evacuation of water much better distributed than with the systems used until now.
  • the low-flow cold water first slides under the hot water which originally fills the pipe 1 and the supply pipe 10; the interface formed by these two immiscible water layers is at substantially constant altitude along the length of the pipe 1 and gradually rises until the cold water completely fills the pipes. This therefore avoids any thermal stratification between two very different temperature layers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Pipeline Systems (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Coating Apparatus (AREA)
EP88402403A 1987-09-25 1988-09-23 Distributeur de fluide dans un réservoir sous pression empêchant une stratification thermique Expired - Lifetime EP0309361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8713296 1987-09-25
FR8713296A FR2621018B1 (fr) 1987-09-25 1987-09-25 Distributeur de fluide dans un reservoir sous pression empechant une stratification thermique

Publications (2)

Publication Number Publication Date
EP0309361A1 EP0309361A1 (fr) 1989-03-29
EP0309361B1 true EP0309361B1 (fr) 1991-03-20

Family

ID=9355237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402403A Expired - Lifetime EP0309361B1 (fr) 1987-09-25 1988-09-23 Distributeur de fluide dans un réservoir sous pression empêchant une stratification thermique

Country Status (9)

Country Link
US (1) US4917146A (xx)
EP (1) EP0309361B1 (xx)
KR (1) KR890004960A (xx)
CN (1) CN1010974B (xx)
CA (1) CA1325932C (xx)
DE (2) DE309361T1 (xx)
ES (1) ES2007579B3 (xx)
FR (1) FR2621018B1 (xx)
ZA (1) ZA887053B (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ281U1 (cs) * 1992-04-03 1993-04-28 Vítkovice, A.S. Zařízení pro napájení tepelného výměníku, zejménaparogenerátoru, sekundární vodou
US6920897B2 (en) * 2001-03-27 2005-07-26 Blair J. Poirier Potable water circulation system
US6705344B2 (en) 2001-03-27 2004-03-16 Blair J. Poirier Potable water circulation system
FR2851031B1 (fr) * 2003-02-12 2005-05-06 Framatome Anp Generateur de vapeur comportant un dispositif de fourniture d'eau d'alimentation realisant le piegeage de corps etrangers
US7634976B2 (en) * 2006-03-30 2009-12-22 Bradford White Corporation Apparatus and method for delivering water into a water heater
US20070227468A1 (en) * 2006-03-30 2007-10-04 Bradford White Corporation Apparatus and method for introducing and drawing water in a water heater
DE102012007411A1 (de) * 2012-04-16 2013-10-17 Areva Gmbh Speisewasserverteilsystem für ein Kernkraftwerk und Verfahren zum Betreiben eines Kernkraftwerks
CN106128525A (zh) * 2016-08-15 2016-11-16 上海核工程研究设计院 一种可消除热分层的冷却剂管道系统
KR20190045244A (ko) * 2016-09-08 2019-05-02 애딕티브 로켓 코포레이션 프랙탈 유체 통로 장치
CN109798510A (zh) * 2019-01-11 2019-05-24 中广核工程有限公司 一种用于压水堆核电站蒸汽发生器的主给水管装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168404A (en) * 1935-05-23 1939-08-08 Carrier Corp Refrigerant distribution
US2164011A (en) * 1937-05-13 1939-06-27 Donald F Ainslee Orchard heating system
US3141000A (en) * 1959-07-14 1964-07-14 Petrolite Corp Apparatus for creating uniform streams in flow passages
GB1144087A (en) * 1966-10-19 1969-03-05 Us Stoneware Inc Distributor
US3785625A (en) * 1971-05-19 1974-01-15 Baltimore Aircoil Co Inc Injector type evaporative heat exchanger
SE7603198L (sv) * 1975-05-12 1976-11-13 Traction Et D Electricite Sa S Matarvattenledning for en anggenerator
DE2833155A1 (de) * 1978-07-28 1980-02-14 Metallgesellschaft Ag Vorrichtung zum dosieren und/oder verteilen von fluessigen medien
GB2065500B (en) * 1979-12-19 1983-09-28 Heat Extractor Corp Heat extractor
FR2496489A1 (fr) * 1980-12-24 1982-06-25 Lorraine Carbone Systeme de distribution de liquide pour appareillages de genie chimique
US4320072A (en) * 1981-02-27 1982-03-16 Ecodyne Corporation Cooling tower spray nozzle
US4566406A (en) * 1983-07-13 1986-01-28 Westinghouse Electric Corp. Sludge removing apparatus for a steam generator
US4505231A (en) * 1984-03-15 1985-03-19 Apcom, Inc. Water heater construction with sediment removal means

Also Published As

Publication number Publication date
CN1010974B (zh) 1990-12-26
ES2007579A4 (es) 1989-07-01
FR2621018B1 (fr) 1990-01-19
FR2621018A1 (fr) 1989-03-31
ES2007579B3 (es) 1991-11-16
DE3862094D1 (de) 1991-04-25
KR890004960A (ko) 1989-05-10
CN1035554A (zh) 1989-09-13
US4917146A (en) 1990-04-17
CA1325932C (en) 1994-01-11
EP0309361A1 (fr) 1989-03-29
DE309361T1 (de) 1989-08-03
ZA887053B (en) 1989-07-26

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