EP0173586B1 - Echangeur de chaleur comportant un faisceau de tubes disposé dans une enveloppe de faisceau cylindrique maintenue radialement à l'intérieur d'une enveloppe cylindrique externe - Google Patents

Echangeur de chaleur comportant un faisceau de tubes disposé dans une enveloppe de faisceau cylindrique maintenue radialement à l'intérieur d'une enveloppe cylindrique externe Download PDF

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Publication number
EP0173586B1
EP0173586B1 EP85400686A EP85400686A EP0173586B1 EP 0173586 B1 EP0173586 B1 EP 0173586B1 EP 85400686 A EP85400686 A EP 85400686A EP 85400686 A EP85400686 A EP 85400686A EP 0173586 B1 EP0173586 B1 EP 0173586B1
Authority
EP
European Patent Office
Prior art keywords
casing
bundle
heat exchanger
envelope
supporting
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
EP85400686A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0173586A1 (fr
Inventor
Roger Neybourger
Christian Olivier
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 EP0173586A1 publication Critical patent/EP0173586A1/fr
Application granted granted Critical
Publication of EP0173586B1 publication Critical patent/EP0173586B1/fr
Expired legal-status Critical Current

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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
    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/205—Supporting and spacing arrangements for tubes of a tube bundle
    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/40—Shell enclosed conduit assembly
    • Y10S165/401—Shell enclosed conduit assembly including tube support or shell-side flow director
    • Y10S165/405—Extending in a longitudinal direction
    • Y10S165/407—Extending in a longitudinal direction internal casing or tube sleeve
    • Y10S165/409—Extending in a longitudinal direction internal casing or tube sleeve including transverse element, e.g. fin, baffle
    • Y10S165/41—Movable internal casing connecting to transverse element

Definitions

  • the invention relates to a heat exchanger comprising a bundle of tubes arranged in a cylindrical bundle envelope maintained radially inside an external cylindrical envelope.
  • Heat exchangers such as the steam generators of a pressurized water nuclear reactor comprise a tube bundle constituted by a very large number of small diameter tubes arranged vertically inside a bundle envelope of generally cylindrical shape. itself arranged inside the envelope in external rigid pressure of great thickness of the steam generator.
  • the pressurized water from the nuclear reactor circulates inside the small diameter tubes and the water to be vaporized is introduced inside the bundle envelope where it comes into contact with the external surface of the tubes.
  • the vapor is recovered at the top of the bundle envelope and then it is generally dried in steam-water separators arranged in the outer envelope of the steam generator above the bundle envelope.
  • the steam generator is supplied with water to be vaporized by a means generally located towards the upper part of the bundle envelope.
  • the water recovered in the vapor by the water-vapor separators is generally returned to the envelope of the bundle for its vaporization.
  • This circulation may require channeling means such as additional cylindrical envelopes arranged coaxially with the bundle envelope and the external envelope of the steam generator, on only part of their lateral surface.
  • Steam generators are very tall units in which the various coaxial envelopes are arranged with a generally small radial spacing.
  • spacer plates through which the tubes of the bundle pass, distributed along the height of the bundle, to maintain the tubes in fixed radial positions with respect to each other.
  • spacer plates are interconnected by vertical tie rods, the assembly being placed inside the bundle envelope.
  • French patent No. 2,511,491 has proposed holding devices in the radial and axial directions of the envelope of the bundle of a steam generator, inside its rigid outer envelope and of greater thickness. These holding devices are fixed to the bundle envelope, according to several assemblies each arranged at a spacer plate, the various support devices of an assembly being distributed around the periphery of the spacer plate. These support devices consist of parts having a thickness greater than the thickness of the bundle envelope fixed in the wall thereof, locally at the level of the spacer plates. These parts are pierced with threaded holes inside which one can screw threaded studs whose projecting end in the space existing between the bundle envelope and the rigid external envelope comes to bear against the interior surface of this envelope external. Supporting of the devices is carried out after adjustment of the studs, by introduction of wedging pieces in the form of a wedge between the outer edge of the spacer plates and the inner surface of the support device directed towards the beam.
  • Such support devices have the disadvantage of occupying a large part of the width of the space reserved between the bundle envelope and the external envelope and thus limiting, appreciably, the passage section for the water spray circulating in this space without ensuring a perfect seal.
  • These support devices also have the drawback of requiring the introduction of wedging parts in notches machined at the peripheral part of the spacer plates. These notches decrease the distance between the peripheral tubes of the bundle and the edge of the spacer plates. If you want to keep a sufficient distance between the peripheral tubes and the plate, then you have to reduce the number of tubes in the bundle.
  • the support parts must have shapes which do not facilitate their fixing by welding in the wall of the bundle envelope.
  • the object of the invention is therefore to propose a heat exchanger comprising a bundle of tubes arranged in a cylindrical bundle envelope held radially inside an external cylindrical envelope and placed coaxially with it, a set of plates spacers arranged transversely with respect to the beam inside the bundle envelope and spaced along its length and several sets of support pieces integral with the bundle envelope, arranged radially at the level of the spacer plates and each inserted between the outer edge of the spacer plates and the inner surface of the outer casing, with interposition of wedging means between the spacer plate and the support piece, heat exchanger, the bundle envelope of which is perfectly maintained in the external envelope by support pieces which constitute only very limited obstacles to the circulation of the fluids in the exchanger, which are perfectly adaptable in the case where the 'heat exchanger comprises more than two coaxial envelopes providing perfectly sealed spaces with respect to each other and which can be set up by welding in a simple and quick way.
  • FIG 1 we see the central part of a steam generator of a pressurized water nuclear reactor.
  • the steam generator comprises a tubular plate 1 in which the tubes of the bundle 2 are fixed, the ends of which open onto the underside of the plate 1. Only the axes of two end U-shaped tubes of the bundle are shown to show the arrangement of this beam.
  • the tubular plate 1 is secured at its lower part to a spherical bottom (not shown) constituting a chamber in two parts, one part of which receives water under pressure at high temperature coming from the nuclear reactor which penetrates into the tubes by one of their ends and the other of which receives the pressurized water which has circulated in the tubes of bundle 2 before its return to the nuclear reactor vessel.
  • the tubular plate 1 is integral at its upper part with the external casing 3 of the steam generator of cylindrical shape in its central part enclosing the bundle.
  • the external cylindrical enclosure 3 is connected by means of a frustoconical part 3a to a steam dome not shown in which are placed the water-steam separators for drying the steam produced in the generator. steam.
  • the bundle 2 is entirely contained in a bundle envelope 5 also of cylindrical shape and disposed inside the outer envelope 3 and coaxial with it.
  • This bundle envelope 5 provides a free space between its lower edge and the upper surface of the tube plate 1.
  • the interior volume of the bundle envelope 5 is separated into two parts by a vertical partition 6 over a fraction of its height.
  • the partition 6 disposed along the central space of the bundle tubes delimits in this bundle, up to a certain height, a hot branch which corresponds to the part of the tubes receiving pressurized water coming from the nuclear reactor and a branch cold which corresponds to the part of the tubes through which the pressurized water leaves the bundle.
  • the steam generator comprises an intermediate envelope 7 coaxial with the envelopes 3 and 5 and disposed between these envelopes on the part of their circumference corresponding substantially to the cold branch of the bundle .
  • This cylindrical intermediate envelope 7 is connected at its upper part to a parallel frustoconical part 7a and opposite the frustoconical part 3a of the external envelope 3.
  • the steam generator shown in FIG. 1 is supplied with water to be vaporized by supply means opening into the space limited by the envelopes 5 and 7.
  • the space between these envelopes closed at its ends as it is visible on the Figures 2 and 3 therefore allows a supply of water to be vaporized by the base of the cold branch of the bundle only.
  • the lower part of the cold branch of the bundle up to the top of the partition 6 therefore allows this feed water to be preheated.
  • the water recovered by the separators located in the vapor dome at the top of the generator returns to the base of the bundle both through the annular space between the outer casing 3 and the bundle casing 5 and by the annular space between the envelope
  • intermediate latch 7 and the outer envelope 3 which are both in communication with the lower part of the hot branch of the bundle and through the annular space comprised between the bundle envelope 5 and the intermediate envelope 7 which is in communication with the lower part of the cold branch of the bundle.
  • the bundle tubes are held laterally by spacer plates 8 arranged transversely inside the envelope 5.
  • Tie rods 9 fixed to their lower part on the tubular plate 1 make it possible to maintain the axial spacing of the spacer plates 8.
  • the support devices 10 of the envelopes 5 and 7 on the external envelope 3 as well as the support devices 11 of the bundle envelope 5 on the external envelope 3 in its part where it is not doubled by the the intermediate envelope 7 are interposed between the edge of the spacer plates 8 and the interior surface of the external envelope 3.
  • FIGS. 2 and 3 it can be seen that these support devices 10 and 11 are regularly distributed around the periphery of the spacer plates 8, the support axes in the radial direction of two successive devices making an angle of 26 °. There are thus around each of the spacer plates, seven support devices such as 10 and seven support devices such as 11. The support axes of radial direction of the devices 10 and 11 placed consecutively make an angle of 24 °.
  • the angular positions of the support devices are given in degrees in Figures 2 and 3 taking as axis 0-180 ° the axis of symmetry of the spacer plate.
  • the support devices placed around the two upper spacer plates and around the two lower half-spacer plates differ from the support devices placed around the intermediate spacer plates (Figure 3) only by the width of the support area and by the number of wedging pieces between the spacer plate and the supporting piece.
  • the envelope 5 is pierced with openings 14 which correspond to the intersection of the envelope 5 with a cylinder whose axis X'X has a radial direction and is located substantially at the level of the axis of the spacer plate 8.
  • This axis X'X constitutes the support axis of the device 10.
  • a cylindrical sheath with a circular base 15 having the axis X ' is fixed by welding to the wall of the bundle 5 X, slightly protruding in the annular space between the bundle envelope 5 and the outer envelope 3.
  • the intermediate envelope 7 has, like the envelope 5, an opening formed by the section of the envelope 7 by a cylinder with an axis XX '. Along this opening 16 of smaller diameter than the opening 14, is fixed by welding to the wall of the envelope 7, a sheath 17 projecting in the space between the envelopes 7 and 5. An annular plate 18 welded to the free ends of the sleeves 15 and 17 makes it possible to connect them.
  • the support piece is constituted by a single piece 20 of generally cylindrical shape with an axis XX '.
  • This support piece 20 includes a large diameter part 20a whose outside diameter is very slightly less than the inside diameter of the sheath 15 and a small diameter part 20b whose outside diameter is very slightly less than the inside diameter of the sheath 17.
  • the face of the support piece 20 directed towards the inside of the steam generator, that is to say towards the bundle and the spacer plate 8 is machined so as to constitute a support surface 20c inclined with respect to the vertical of an angle close to 5 °.
  • This bearing surface 20c is therefore inclined in the radial direction relative to the horizontal axis XX '.
  • the angle of inclination of this support surface 20c corresponds to the machining angle of the shims 23 interposed between the spacer plate 8 and the support piece 20.
  • the end of the small-diameter part 20b of the part 20 directed towards the internal surface of the external envelope 3 is machined to constitute a spherical bearing surface between the part 20 and this internal surface.
  • the support piece 20 is placed as shown in FIGS. 4 and 5 so that its spherical end surface is in contact with the internal surface of the envelope 3.
  • a circular weld 24 is then produced between the external lateral surface of the part 20a of this part and the internal surface of the sheath 15. This operation is facilitated by the fact that a circular welding of parts of revolution is carried out.
  • the shims are fixed by welds on the bearing face 20c of the part 20.
  • the support devices 10 allow radial support both of the 'bundle casing 5 and the intermediate casing 7 fixed to the casing 5 at the support devices by the sleeves 17 and 15 and by the annular plate 18. It may also be noted that the space between the casings 5 and 7 remains perfectly isolated from the rest of the annular space between the bundle envelope 4 and the outer envelope 3, by the fact that the parts of revolution are welded over their entire periphery, the support part being placed outside this isolated internal space.
  • the support devices 11 between the bundle envelope 5 and the external envelope 3, in the part of this envelope which is not surrounded by the intermediate envelope 7, consist of a support piece identical to the piece 20 welded by its large diameter part to a sheath identical to the cylindrical sheath 15 fixed at an opening identical to the opening 14 in the wall of the envelope 5.
  • a support device 11 comprises all of the elements shown in FIGS. 4, 5 and 6 with the exception of the sheath 17 and the annular plate 18.
  • FIGS. 7, 8 and 9 an alternative embodiment of the support piece is seen, the latter no longer being in one piece but made up of two separate pieces 30a and 30b.
  • the large diameter part 30a is welded inside a cylindrical sleeve with a circular base 25 itself welded to the casing 5 along an opening in this wall identical to the openings 14 of the embodiment shown in the figures 4 to 6.
  • the small diameter part 30b coming to bear on the internal surface of the external envelope 3 is itself fixed by welding on a cylindrical sleeve with circular base 27 fixed on the intermediate envelope 7 and coaxial with the sleeve 25.
  • the parts 30a and 30b come to bear one on the other by flat faces, when shims 33 are interposed between the external lateral edge of the spacer plate 8 and the bearing surface 30c inclined relative to the vertical machined on the face of the part 30a directed inwards, that is to say towards the bundle of the steam generator.
  • the parts 30a and 30b are connected by a circular weld to the sleeves 25 and 27 respectively.
  • the support of the parts 30a and 30b on the spacer plate 8 and on the external wall 3 is then carried out by placing shims 33.
  • the main advantages of the heat exchanger according to the invention are to include support devices in the radial direction of its internal envelopes and beam spacer plates on its rigid external envelope, which are extremely effective and do not introduce only a slight disturbance of the circulation of the fluids of the heat exchanger in the spaces between these envelopes.
  • the support piece comprises a part with a small section which can extend in the radial direction over the largest part of the space between the envelopes, the part with large diameter allowing the fixing of this support piece. on the beam envelope which can, conversely, be of reduced length.
  • these support devices can be fixed only by circular welds which are easy to produce.
  • the installation of these support devices on the envelopes is carried out by means of cylindrical sleeves and welded annular plates which make it possible to make absolutely watertight junctions between the envelopes, which makes it possible to maintain perfect insulation of the spaces between the envelopes one to another.
  • the support devices of the heat exchanger according to the invention are on the other hand of a shape such that they can be adapted to heat exchangers comprising any number of internal casings.
  • the support pieces and the wedging pieces can be of a different shape from those which have been described.
  • the number of support devices distributed around a spacer plate is not limited, each of these support devices producing only a small obstacle to the circulation of the fluid in the spaces between the envelope and the outer casing of the steam generator.
  • the shape and distribution of the support devices around the spacer plates over the height of the steam generator may be different from those which have been described.
  • the invention applies not only to the case of steam generators of pressurized water nuclear reactors but also to the case of other heat exchangers comprising a bundle of tubes disposed in a cylindrical bundle envelope itself placed at inside a rigid external cylindrical pressure casing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP85400686A 1984-04-11 1985-04-05 Echangeur de chaleur comportant un faisceau de tubes disposé dans une enveloppe de faisceau cylindrique maintenue radialement à l'intérieur d'une enveloppe cylindrique externe Expired EP0173586B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8405719 1984-04-11
FR8405719A FR2562996B1 (fr) 1984-04-11 1984-04-11 Echangeur de chaleur comportant un faisceau de tubes dispose dans une enveloppe de faisceau cylindrique maintenue radialement a l'interieur d'une enveloppe cylindrique externe

Publications (2)

Publication Number Publication Date
EP0173586A1 EP0173586A1 (fr) 1986-03-05
EP0173586B1 true EP0173586B1 (fr) 1988-06-22

Family

ID=9303067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400686A Expired EP0173586B1 (fr) 1984-04-11 1985-04-05 Echangeur de chaleur comportant un faisceau de tubes disposé dans une enveloppe de faisceau cylindrique maintenue radialement à l'intérieur d'une enveloppe cylindrique externe

Country Status (9)

Country Link
US (1) US4655281A (ko)
EP (1) EP0173586B1 (ko)
JP (1) JPS60232499A (ko)
KR (1) KR940001782B1 (ko)
CA (1) CA1253849A (ko)
DE (1) DE3563475D1 (ko)
ES (1) ES8701965A1 (ko)
FR (1) FR2562996B1 (ko)
YU (1) YU60185A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11678569B2 (en) 2020-03-31 2023-06-13 Idemitsu Kosan Co., Ltd. Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699656B1 (fr) * 1992-12-23 1995-01-13 Framatome Sa Echangeur de chaleur à dispositif de maintien anti-sismique et de supportage anti-envol de l'enveloppe entourant le faisceau de tubes.
FR2707372B1 (fr) * 1993-07-05 1995-08-11 Framatome Sa Dispositif de maintien radial de l'enveloppe de faisceau et des plaques-entretoises d'un générateur de vapeur par des butées à excentrique.
FR2707373B1 (fr) * 1993-07-05 1995-08-11 Framatome Sa Dispositif de maintien radial de l'enveloppe de faisceau et des plaques-entretoises d'un générateur de vapeur.
FR2711223B1 (fr) * 1993-10-14 1995-11-03 Framatome Sa Dispositif de maintien radial de l'enveloppe de faisceau et des plaques entretoises d'un générateur de vapeur par des butées à positionnement élastique.
FR2712960B1 (fr) * 1993-11-26 1995-12-29 Framatome Sa Dispositif de maintien radial de l'enveloppe de faisceau et des plaques-entretoises d'un générateur de vapeur par des butées à vis prisonnière.
JP5871472B2 (ja) * 2011-02-08 2016-03-01 三菱重工業株式会社 管群外筒の組立方法及び蒸気発生器の組立方法、管群外筒の移動装置
CN111055228A (zh) * 2019-12-16 2020-04-24 东方电气(广州)重型机器有限公司 一种换热器类支撑固定装置及安装方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267020A (en) * 1978-08-14 1981-05-12 Westinghouse Electric Corp. Nuclear steam generator wrapper and shell assembly and method for assembling
US4415021A (en) * 1981-08-17 1983-11-15 Westinghouse Electric Corp. Positioning a thin wall round wrapper within a heavy wall out-of-round shell of a heat exchanger
FR2515806B1 (fr) * 1981-10-30 1987-04-17 Creusot Loire Dispositif de fixation anti-seisme d'un faisceau tubulaire, notamment pour generateur de vapeur et procede de montage d'un tel dispositif
US4503903A (en) * 1982-07-06 1985-03-12 Westinghouse Electric Corp. Heat exchanger tube sheet radial support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11678569B2 (en) 2020-03-31 2023-06-13 Idemitsu Kosan Co., Ltd. Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device

Also Published As

Publication number Publication date
YU60185A (en) 1987-12-31
EP0173586A1 (fr) 1986-03-05
DE3563475D1 (en) 1988-07-28
JPH0514193B2 (ko) 1993-02-24
ES542109A0 (es) 1986-12-01
US4655281A (en) 1987-04-07
JPS60232499A (ja) 1985-11-19
FR2562996A1 (fr) 1985-10-18
ES8701965A1 (es) 1986-12-01
FR2562996B1 (fr) 1986-06-20
CA1253849A (en) 1989-05-09
KR850007693A (ko) 1985-12-07
KR940001782B1 (ko) 1994-03-05

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