US3896873A - Heat exchanger with a removable tube section - Google Patents

Heat exchanger with a removable tube section Download PDF

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Publication number
US3896873A
US3896873A US248922A US24892272A US3896873A US 3896873 A US3896873 A US 3896873A US 248922 A US248922 A US 248922A US 24892272 A US24892272 A US 24892272A US 3896873 A US3896873 A US 3896873A
Authority
US
United States
Prior art keywords
blocks
heat exchanger
shell
inner core
slot
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
US248922A
Other languages
English (en)
Inventor
Walter Wolowodiuk
John Anelli
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.)
US Atomic Energy Commission (AEC)
Original Assignee
US Atomic Energy Commission (AEC)
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 US Atomic Energy Commission (AEC) filed Critical US Atomic Energy Commission (AEC)
Priority to US248922A priority Critical patent/US3896873A/en
Priority to CA165,810A priority patent/CA967556A/en
Priority to GB1606873A priority patent/GB1423388A/en
Priority to DE2320082A priority patent/DE2320082A1/de
Priority to FR7315481A priority patent/FR2183091B1/fr
Priority to SU1914242A priority patent/SU543362A3/ru
Priority to JP48049646A priority patent/JPS4961746A/ja
Application granted granted Critical
Publication of US3896873A publication Critical patent/US3896873A/en
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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • 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
    • F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
    • F22B1/063—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium for metal cooled nuclear reactors
    • 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
    • F22B37/207—Supporting arrangements for drums and collectors
    • 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
    • F22B37/24—Supporting, suspending, or setting arrangements, e.g. heat shielding
    • F22B37/246—Supporting, suspending, or setting arrangements, e.g. heat shielding for steam generators of the reservoir type, e.g. nuclear steam generators
    • F22B37/248—Supporting, suspending, or setting arrangements, e.g. heat shielding for steam generators of the reservoir type, e.g. nuclear steam generators with a vertical cylindrical wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/02—Removable elements

Definitions

  • the fluid which passes over the outside of the tubes is the heating or primary fluid or the heated or secondary fliud
  • a pressure at the tube sheet is created. It is necessary, therefore, that heat exchangers are constructed so that the tube sheet can resist the internal pressure caused by the fluid flowing over the tubes.
  • the tube section must be removed for repair, for example. when a tube fails. If the secondary fluid is water or steam, the heat exchanger is shut down and the tube section is removed so that the ruptured tube can be plugged to thereby prevent a sodium water reaction when the heat exchanger is put back into service. If the secondary fluid is sodium. it is also desirable that the tube section be quickly removed to allow the ruptured tube to be plugged to prevent intermingling of the primary and secondary sodium. This is necessary because the primary sodium is usually radioactive and safety and health requirements call for a secondary sodium which is not in direct heat exchange with the primary sodium to prevent it from becoming radioactive.
  • a heat exchanger having a tube sheet with primary fluid on one side and secondary fluid on the other which is connected with a bearing surface adjacent to the side of the surface farthest from the tube sheet which is engaged by a plurality of shear blocks which extend outwardly into a slot which is held immovable with respect to the shell so that the shear blocks hold the tube sheet against pressure created by the fluid flowing over the tubes. but which permit the tube sheet and its associated tubes to be easily removed for inspection or repair.
  • FIG. 1 is aside view, partly in section, of a portion of a heat exchanger made in accordance with the present invention
  • FIG. 2 is a plan view showing the shear blocks of FIG. I, arranged in proper position with respect to each other to secure the tube sheet and tube section of the heat exchanger;
  • FIG. 3 is a side view. partly in section. showing the shear blocks of FIG. I and FIG. 2 in relation to their contiguous elements.
  • FIG. 1 the upper end portion of a heat exchanger 10 having an outer shell 12 which is generally circular in cross-section with a primary fluid inlet 13 and an outwardly projecting flange 14 at the upper end.
  • the outer shell 12 and the entire heat exchanger 10 is suspended from a vertically extending suspender cylinder 16 which has a flange 18 at its upper end which rests on an annular lip 20 which extends around a hole 22 in a concrete floor 24.
  • an inwardly extending flange 26 having at its inner marginal portion a bearing surface 28 upon which rests the flange 14.
  • the flange 14 is secured to the flange 26 by a ring 30 which is mounted to the top of the flange 26 and which has an inwardly extending rib 32 which projects into and fits tightly within an annular groove 34 in the outer surface of the flange l4.
  • the inner core includes a tube section comprising a tube sheet 42, a plurality of tubes 44 extending downwardly to a lower tube sheet (not shown).
  • the tube sheet 42 is annular in configuration and encircles a centrally located pipe 48.
  • the purpose of the central pipe 48 is to allow the secondary fluid to flow to the bottom of the heat exchanger so that it can reverse its direction and flow upwardly through the tubes 44 to be heated by primary fluid. It is then collected above the tube sheet 42 to leave by a secondary outlet 49.
  • a flow shroud 50 encircles the tubes 44 over most of their length. It extends upwardly to a level below the tube sheet 42 so that primary fluid entering at 13 will flow upwardly and over the top of the shroud to then flow downwardly over the tubes 44 and thereby indirectly heat the secondary fluid flowing upwardly in the tubes 44.
  • the upflow of primary fluid causes some pressure at the lower surface of the tube sheet 42.
  • variations in temperature and static pressure of fluid entering at 14 can cause variations in the pressure which is exerted by the primary fluid at the lower surface of the tube sheet 42.
  • the entire inner core 40 is suspended from an annular generally vertically extending ring 52 which merges with the inner core just above the tube sheet 42 and which has an outwardly extending flange 54 at its top.
  • the outwardly extending flange 54 rests on an inwardly extending ledge 54 on the flange 14.
  • Upward pressure on the tube sheet 42 created by the primary fluid is resiste'd by a plurality of shear blocks 60 which extend over an annular bearing surface 61 which is a portion of the top of the flange 54 and extend outward and into an annular slot 62 in the flange 14.
  • the flanges 54 and 14 have between them an omega seal 64. This prevents the escape of primary fluid between the flanges l4 and 54.
  • Extending between the flanges l4 and 54 and bridging the shear blocks 60 is a ring 66 which prevents rotation between the flanges l4 and 54. It also provides a secondary seal between those flanges.
  • the shear blocks 60 are placed annularly around the top of the flange 54 and are alternately positioned with respect to shear blocks 70.
  • the shear blocks 60 are wider at their inner edge portion than they are at their outer edge portion, while the shear blocks 70 are wider at their outer edge portion than they are attheir inner edge portion.
  • the inner core 40 can be moved upward for repair and/or inspection. lnward movement of the shear blocks 60 and 70 is facilitated by the provision of an upwardly extending projection 72 at their inner portions. Tools can grip or strike against these projections and thereby exert the force necessary to move the blocks 60 and 70 inward.
  • a heat exchanger comprising:
  • each block extending into said slot and the inner edges of said blocks being free of engagement with any structure so that each of said blocks can be moved inward and out of said slot;
  • shear blocks prevent said inner core from moving upward but can be moved inward and out of engagement with said slot so that said inner core can be lifted out of said shell.
  • shear blocks are of two types, said two types being alternately positioned along said surface, one of said types being wider at .the inner edge than the outer edge, the other of said types being wider at the outer edge than at the inner edge, whereby each of said one type may be moved inwardly and subsequently the blocks of the other type may be moved inwardly to permit said inner core to be moved axially and out of said outer shell.
  • the heat exchanger defined in claim 1 further' comprising a ring bridging said blocks and connected with said bearing surface and said shell to prevent relainner core out of said outer shell.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US248922A 1972-05-01 1972-05-01 Heat exchanger with a removable tube section Expired - Lifetime US3896873A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US248922A US3896873A (en) 1972-05-01 1972-05-01 Heat exchanger with a removable tube section
CA165,810A CA967556A (en) 1972-05-01 1973-03-12 Heat exchanger with removable tube section
GB1606873A GB1423388A (en) 1972-05-01 1973-04-04 Heat exchanger with removable tube section
DE2320082A DE2320082A1 (de) 1972-05-01 1973-04-19 Waermeaustauscher mit abnehmbarem rohrabschnitt
FR7315481A FR2183091B1 (fr) 1972-05-01 1973-04-27
SU1914242A SU543362A3 (ru) 1972-05-01 1973-04-28 Узел соединени в вертикальном теплообменнике коллекторной камеры с корпусом
JP48049646A JPS4961746A (fr) 1972-05-01 1973-05-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US248922A US3896873A (en) 1972-05-01 1972-05-01 Heat exchanger with a removable tube section

Publications (1)

Publication Number Publication Date
US3896873A true US3896873A (en) 1975-07-29

Family

ID=22941271

Family Applications (1)

Application Number Title Priority Date Filing Date
US248922A Expired - Lifetime US3896873A (en) 1972-05-01 1972-05-01 Heat exchanger with a removable tube section

Country Status (7)

Country Link
US (1) US3896873A (fr)
JP (1) JPS4961746A (fr)
CA (1) CA967556A (fr)
DE (1) DE2320082A1 (fr)
FR (1) FR2183091B1 (fr)
GB (1) GB1423388A (fr)
SU (1) SU543362A3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321750A1 (fr) * 1975-08-22 1977-03-18 Commissariat Energie Atomique Perfectionnement apporte aux circuits secondaires d'un reacteur nucleaire
US4192053A (en) * 1977-09-19 1980-03-11 Westinghouse Electric Corp. Method for retubing a steam generator
US4200061A (en) * 1977-08-05 1980-04-29 Kraftwerk Union Aktiengesellschaft Steam generator for nuclear power plants, especially for pressurized water reactors
DE2950171A1 (de) * 1978-12-22 1980-06-26 Ferodo Sa Montage-vorrichtung fuer einen waerme-austauscher im gehaeuse einer heizungsapparatur o.dgl.
US4369217A (en) * 1979-10-11 1983-01-18 Leistritz Hans Karl Cavity-forming support element made of extruded hollow sections in combination with closure members of other materials or alloys
US4638768A (en) * 1985-04-04 1987-01-27 Westinghouse Electric Corp. Steam generator tubesheet/channel head/centerstay assembly
US6223808B1 (en) * 1997-01-27 2001-05-01 Honda Giken Kogyo Kabushiki Kaisha Supporting structure for heat exchanger
WO2004065873A1 (fr) * 2003-01-17 2004-08-05 Ruths S.P.A. Unites d'echange de chaleur

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2448832C2 (de) * 1974-10-14 1985-03-07 Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach Flüssigmetall/Wasser-Wärmetauscher mit auswechselbaren Rohrbündeln
DE2517693C2 (de) * 1975-04-22 1984-01-19 Hochtemperatur-Reaktorbau GmbH, 5000 Köln Als Längsgegenstromapparat ausgebildeter Wärmeaustauscher
JPH0443749Y2 (fr) * 1985-04-05 1992-10-15
FR2589222B1 (fr) * 1985-10-29 1988-01-15 Novatome Dispositif de support de gros appareils a paroi mince
CN111964487B (zh) * 2020-08-17 2021-10-01 淄博宝丰换热设备有限公司 一种可容置较多换热管的小型化高效换热器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1757724A (en) * 1928-02-17 1930-05-06 Smith Corp A O Packing appliance for pipe testing
US2857142A (en) * 1955-08-05 1958-10-21 Gertzon Nils Heat exchanger
US3424480A (en) * 1966-03-30 1969-01-28 Richard W Holland Closure connection means for a heat exchanger
US3526275A (en) * 1968-05-27 1970-09-01 Du Pont Tube bundle assembly having baffle and header seal features for use in plastic tube heat transfer apparatus combinations
US3656543A (en) * 1970-05-25 1972-04-18 Foster Wheeler Corp Liquid metal heat exchanger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1216983A (en) * 1967-06-21 1970-12-23 Atomic Energy Authority Uk Nuclear reactor pressure vessel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1757724A (en) * 1928-02-17 1930-05-06 Smith Corp A O Packing appliance for pipe testing
US2857142A (en) * 1955-08-05 1958-10-21 Gertzon Nils Heat exchanger
US3424480A (en) * 1966-03-30 1969-01-28 Richard W Holland Closure connection means for a heat exchanger
US3526275A (en) * 1968-05-27 1970-09-01 Du Pont Tube bundle assembly having baffle and header seal features for use in plastic tube heat transfer apparatus combinations
US3656543A (en) * 1970-05-25 1972-04-18 Foster Wheeler Corp Liquid metal heat exchanger

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321750A1 (fr) * 1975-08-22 1977-03-18 Commissariat Energie Atomique Perfectionnement apporte aux circuits secondaires d'un reacteur nucleaire
US4200061A (en) * 1977-08-05 1980-04-29 Kraftwerk Union Aktiengesellschaft Steam generator for nuclear power plants, especially for pressurized water reactors
US4192053A (en) * 1977-09-19 1980-03-11 Westinghouse Electric Corp. Method for retubing a steam generator
DE2950171A1 (de) * 1978-12-22 1980-06-26 Ferodo Sa Montage-vorrichtung fuer einen waerme-austauscher im gehaeuse einer heizungsapparatur o.dgl.
US4369217A (en) * 1979-10-11 1983-01-18 Leistritz Hans Karl Cavity-forming support element made of extruded hollow sections in combination with closure members of other materials or alloys
US4638768A (en) * 1985-04-04 1987-01-27 Westinghouse Electric Corp. Steam generator tubesheet/channel head/centerstay assembly
US6223808B1 (en) * 1997-01-27 2001-05-01 Honda Giken Kogyo Kabushiki Kaisha Supporting structure for heat exchanger
WO2004065873A1 (fr) * 2003-01-17 2004-08-05 Ruths S.P.A. Unites d'echange de chaleur
US20060144562A1 (en) * 2003-01-17 2006-07-06 Marco Castello Heat exchange units
US7958933B2 (en) 2003-01-17 2011-06-14 Ruths S.P.A. Heat exchange units

Also Published As

Publication number Publication date
SU543362A3 (ru) 1977-01-15
FR2183091B1 (fr) 1976-05-07
FR2183091A1 (fr) 1973-12-14
DE2320082A1 (de) 1973-11-22
GB1423388A (en) 1976-02-04
CA967556A (en) 1975-05-13
JPS4961746A (fr) 1974-06-14

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