NL8302855A - Modular heat exchanger - for steam generation in a nuclear reactor, with tube vibration suppression - Google Patents

Modular heat exchanger - for steam generation in a nuclear reactor, with tube vibration suppression Download PDF

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Publication number
NL8302855A
NL8302855A NL8302855A NL8302855A NL8302855A NL 8302855 A NL8302855 A NL 8302855A NL 8302855 A NL8302855 A NL 8302855A NL 8302855 A NL8302855 A NL 8302855A NL 8302855 A NL8302855 A NL 8302855A
Authority
NL
Netherlands
Prior art keywords
feed water
steam
chamber
heat exchanger
tube
Prior art date
Application number
NL8302855A
Other languages
Dutch (nl)
Original Assignee
Babcock & Wilcox Co
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 Babcock & Wilcox Co filed Critical Babcock & Wilcox Co
Priority to NL8302855A priority Critical patent/NL8302855A/en
Publication of NL8302855A publication Critical patent/NL8302855A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1669—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0054—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for nuclear applications

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Heat exchanger, partic. for incorporation in the pressure vessel of a nuclear reactor, comprises (a) a steam collector spaced from a feed water collector, by means of two tube plates connected by a series of longitudinal steam-producing tubes so as to form a fluid connection between the feed water and steam collectors or chambers; (b) a series of spacing grids arranged transversely in contact with the steam-producing tubes, with elastic lugs formed on the grids in such a way as to come into contact with the tube surfaces and limit their vibration; (c) a feed water tube traversing the steam chamber to establish fluid communication with the feed water chamber, and having an external concentric casing fixed to the tube plates.

Description

Korte Aanduiding: Warmtewisselaar.Short Designation: Heat exchanger.

* - - -1- 23390/CV/tl* - - -1- 23390 / CV / tl

De uitvinding heeft betrekking op een warmtewisselaar voorzien van een stoomkop,van een voedingswaterkop en van een paar met de koppen ver-5 bonden pijpplaten voor het vormen van een stoomkamer resp. een voedings- · waterkamer,terwijl een aantal stoomopwekpijpén in lengterichting is opgesteld tussen en bevestigd aan de pijpplaten voor het tot stand brengen van fluidumverbinding tussen de voedingswaterkamer en de stoomkamer ,waarbij de pijpen worden ondersteund door tussen de pijpplaten 10 gelegen afstandroosters.The invention relates to a heat exchanger provided with a steam head, with a feed water head and with a pair of pipe plates connected to the heads to form a steam chamber, respectively. a feed water chamber, while a plurality of steam generating pipes are arranged longitudinally between and attached to the pipe plates to establish fluid communication between the feed water chamber and the steam chamber, the pipes being supported by spacer grilles located between the pipe plates 10.

Bij kernreactors zijn dergelijke warmtewisselaars in het algemeen opgesteld boven de reactorkern binnen het drukvat. Daarbij wordt het primaire koelmiddel rondgevoerd door de kern van de reactor en langs de buitenzijde van de stoomopwekpijpén in de warmtewisselaar terwijl een 15 secondair koelmiddel door de afzonderlijke pijpen stroomt en daarin van water in stoom wordt omgezet.Meestal zijn daarbij meerdere warmtewisselaars in een ringvormige reeks in het drukvat boven de reactorkern opgesteld.Daarnij strekken de voedingswaterbüizen zich veelal over een zekere afstand door het primaire koelmiddel uit,waardoor het probleem 20 ontstaat,dat reeds in de voedingswaterbuis het water gedeeltelijk in stoom kan worden omgezet,waardoor onstabiele omstandigheden met betrekking tot toevoer van secondair koelwater aan de warmtewisselaar en dergelijke kunnen oristaan.In nuclear reactors, such heat exchangers are generally arranged above the reactor core within the pressure vessel. In addition, the primary coolant is circulated through the core of the reactor and along the outside of the steam generating pipes in the heat exchanger while a secondary coolant flows through the individual pipes and is converted from water to steam therein, usually several heat exchangers in an annular series positioned in the pressure vessel above the reactor core. The feed water pipes often extend a certain distance through the primary coolant, causing the problem that the water can already partially be converted into steam in the feed water pipe, so that unstable conditions with regard to supply of secondary cooling water to the heat exchanger and the like may oristane.

Met de uitvinding wordt beoogd een warmtewisselaar van bovengenoemde -25 soort te verkrijgen,waarbij bovengeschetste voortijdige verwarming van het voedingswater kan worden vermeden.The object of the invention is to obtain a heat exchanger of the above -25 type, wherein the above-mentioned premature heating of the feed water can be avoided.

Volgens de uitvinding kan dit worden bereikt doordaat een voedingswaterbuis is gevoerd door de stoomkamer voor het tot stand brengen van fluidumverbinding met de voedingswaterkamer ,waarbij de voedingswater-30 buis concentrisch is omgeven door een afscherming,die is bevestigd in de buisplaten.According to the invention, this can be achieved by a feed water tube being passed through the steam chamber to establish fluid communication with the feed water chamber, the feed water tube being concentrically surrounded by a shield mounted in the tubular plates.

Door toepassing van de constructie volgens de uitvinding kan op eenvoudige wijze een ongewenste verwarmingvan het toegevoerde secondaire koelmiddel in de voedingswaterbuis worden vermeden.By using the construction according to the invention, undesired heating of the supplied secondary coolant in the feed water pipe can be avoided in a simple manner.

35 De uitvinding zal hieronder nader worden uiteengezet aan de hand van bijgaande figuur waarin gedeeltelijk in zijaanzicht en gedeeltdijk 8302855 -2- 23390/CV/tl «The invention will be explained in more detail below with reference to the accompanying figure, in which partial side view and partial dike 8302855 -2-23390 / CV / tl «.

KTKT

« in doorsnede een warmtewisselaar volgens de uitvinding is weergegeven.A cross-section of a heat exchanger according to the invention is shown.

Zoals in de figuur is weergegeven omvat de weergegeven warmtewisselaar een stoomkop 102 met een daaraan bevestigde pijpplaat 101 alsmede een voedingswaterkop 105 met een daarmede verbonden pijpplaat 104.Tussen 5 de pijpplaten strekken zich op gebruikelijke wijze de stoomopwekpijpen uit.As shown in the figure, the shown heat exchanger comprises a steam head 102 with a pipe plate 101 attached thereto and a feed water head 105 with a pipe plate 104 connected thereto. Between the pipe plates the steam generating pipes extend in the usual manner.

Voor de toevoer van voedingswater aan de voedingswaterinlaatkamer 103 is een voedingswaterinlaatpijp 100 aangebracht,welke is opgebouwd uit een eigenlijke voedingspijp 107 en een de voedingspijp concentrisch 10 omgevende afscherming of mantel 106. Daarbij is de voedingswaterinlaatpijp verschuifbaar door de pijpplaat 101 en de stoomuitlaatkop 102 gevoerd. Daarbij zijn de uiteinden van de afscherming 106 opgenomen in uitsparingen ,die zijn gevormd in de oppervlakken van de pijpplaten 101 en 104 terwijl de voedingspijp 107 3s gevoa?d door in de beide pijpplaten 15 gevormde doorboringen en stevig in de pijpplaten is vastgezet door rollen,lassen of dergelijke.For the supply of feed water to the feed water inlet chamber 103, a feed water inlet pipe 100 is provided, which is built up from an actual feed pipe 107 and a shield or jacket 106 concentrically surrounding the feed pipe. The feed water inlet pipe is slidably passed through the tube plate 101 and the steam outlet head 102. In addition, the ends of the shield 106 are received in recesses formed in the surfaces of the tube plates 101 and 104, while the feed pipe 107 3s is fed through bores formed in the two tube plates 15 and is firmly secured in the tube plates by rollers, welding or the like.

Zoals verder nog uit de figuur blijkt zijn de stoomopwekbuizen ondersteund door afstandsroosters 108,die zijn voo'rzien van veerkrachtige uit-steeksels^welke aangrijpen op de buitenwanden van de stoomopwekpijpen 20 om ongewenste trillingen van deze pijpen tijdens bedrijf van de warmte-wiseelaar te voorkomen.As further illustrated in the figure, the steam generating tubes are supported by spacer grids 108 which are provided with resilient protrusions which engage the outer walls of the steam generating tubes 20 to prevent unwanted vibrations of these tubes during operation of the heat exchanger .

25 830285525 8302855

Claims (1)

1. Warmtewisselaar voorzien van een stoomkop,van een voedingswaterkop en van met de koppen verbonden pijpplaten voor het vormen van een stoom-kamer resp. een voedingskamer,terwijl een aantal stoomopwekpijpen in lengterichting is opgesteld tussen en bevestigd aan de pijpplaten voor 5 het tot stand brengen van fluidumverbinding tussen de voedingswaterkamer-en de stoomkamer,waarbij de pijpen worden ondersteund door tussen de pijpplaten gelegen afstandsroosters ,met het kenmerk,dat een voedingswater-buis is gevoerd door de stoomkamer voor het tot stand brengen van fluidumverbinding met de voedingswaterkamer,waarbij de voedingswaterbuis concen-10 trisch is omgeven door een afscherming,welke is bevestigd in de buisplaten. 8302855 _ _*1. Heat exchanger provided with a steam head, with a feed water head and with tube plates connected to the heads to form a steam chamber or. a feeding chamber, while a plurality of steam generating pipes are arranged longitudinally between and attached to the pipe plates for establishing fluid communication between the feed water chamber and the steam chamber, the pipes being supported by spacer grilles located between the pipe plates, characterized in that a feed water tube is passed through the steam chamber to establish fluid communication with the feed water chamber, the feed water tube being concentrically surrounded by a shield mounted in the tubular plates. 8302855 _ _ *
NL8302855A 1983-08-15 1983-08-15 Modular heat exchanger - for steam generation in a nuclear reactor, with tube vibration suppression NL8302855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL8302855A NL8302855A (en) 1983-08-15 1983-08-15 Modular heat exchanger - for steam generation in a nuclear reactor, with tube vibration suppression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8302855A NL8302855A (en) 1983-08-15 1983-08-15 Modular heat exchanger - for steam generation in a nuclear reactor, with tube vibration suppression
NL8302855 1983-08-15

Publications (1)

Publication Number Publication Date
NL8302855A true NL8302855A (en) 1983-12-01

Family

ID=19842270

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8302855A NL8302855A (en) 1983-08-15 1983-08-15 Modular heat exchanger - for steam generation in a nuclear reactor, with tube vibration suppression

Country Status (1)

Country Link
NL (1) NL8302855A (en)

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Legal Events

Date Code Title Description
A1A A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
BN A decision not to publish the application has become irrevocable