EP2600092A1 - Vertikaler Wärmetauscher - Google Patents

Vertikaler Wärmetauscher Download PDF

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Publication number
EP2600092A1
EP2600092A1 EP11191611.0A EP11191611A EP2600092A1 EP 2600092 A1 EP2600092 A1 EP 2600092A1 EP 11191611 A EP11191611 A EP 11191611A EP 2600092 A1 EP2600092 A1 EP 2600092A1
Authority
EP
European Patent Office
Prior art keywords
fluid
tubes
shell
heat exchanger
evaporator
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.)
Withdrawn
Application number
EP11191611.0A
Other languages
English (en)
French (fr)
Inventor
Alfred Dethier
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.)
Cockerill Maintenance and Ingenierie SA
Original Assignee
Cockerill Maintenance and Ingenierie 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 Cockerill Maintenance and Ingenierie SA filed Critical Cockerill Maintenance and Ingenierie SA
Priority to EP11191611.0A priority Critical patent/EP2600092A1/de
Priority to BE2012/0075A priority patent/BE1020494A3/fr
Publication of EP2600092A1 publication Critical patent/EP2600092A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F28D7/1676—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 with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • 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
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

Definitions

  • the present invention pertains to the technical field of once-through vertical heat exchangers/evaporators.
  • the solar radiation is directed and concentrated by means of parabolic or plane mirrors towards a heat exchanger containing the thermal fluid.
  • the circulation of the thermal fluid brings the heat back to a water/steam exchanger transforming the heat captured by the thermal fluid into a steam that can be used in a steam turbine.
  • the turbine is part of a classical steam cycle in a power plant and is coupled to a generator producing electric current.
  • thermal fluid/water steam heat exchangers are mainly classified in two families:
  • the evaporator is able to generate only saturated steam that has then to be superheated in a separate exchanger, which is also fed with thermal fluid.
  • the water can be transformed into superheated steam, which can be directly used in a turbine, with only one passage: it is then referred to a mono-tubular or once-through boiler.
  • the bundle exchanger allows to work at high pressure, which guarantees a better yield, while allowing control of the cyclical thermal constraints.
  • Siemens AG developed a bundle exchanger, according to the once-through (or so-called Benson) technology, which is used in numerous classical power plants.
  • Benson the once-through (or so-called Benson) technology, which is used in numerous classical power plants.
  • the heat exchanger of this conception shows disadvantages such as its cost and its almost impossibility of being maintained.
  • a cylindrical shell houses a bundle of parallel tubes extending between two end manifolds or collectors so that a first fluid, generally water intended to be transformed into steam in the shell, can tightly pass through the pipes.
  • a first fluid generally water intended to be transformed into steam in the shell
  • feed water is supplied to the lower ends of the pipes in the bundle of tubes through the lower collector.
  • the steam is discharged from the upper end of the bundle of tubes through pipes sections into the upper collector.
  • a second fluid for example liquid sodium in document US 3,628,507
  • the flow path of the second fluid is determined by intermediate baffles forming respective passages so that the second fluid flow changes its direction in passing from one passage to the next one.
  • the baffles are under the form of partial circular segments or annular rings and disks, installed perpendicular to the longitudinal axis of the shell to provide a zigzag flow of the second fluid.
  • Document CN 200993535 Y discloses a vertical steam-water heat exchanger designed to exhaust the incondensable gases accumulating in the upper region of the exchanger shell, causing circulation hindering and finally overheating and destruction of the heat exchange tubes.
  • the exchanger shell is made of tube sheets or plates assembled to pass alternate baffle plates. A drawback of this configuration is that the heat exchange is reduced in the middle of the shell.
  • the present invention aims at avoiding the drawbacks of prior art.
  • the invention aims at proposing a new kind of heat exchanger of the type bundle or one-through.
  • the invention also proposes an exchanger offering a lower cost and a maintenance rendered possible.
  • the present invention relates to a vertical heat exchanger/evaporator comprising a cylindrical shell housing a bundle of parallel vertical tubes in which, in use, is flowing a first fluid, said tubes extending between a lower end plate and an upper end plate, said lower end plate being fed with said first fluid by an inlet collector and said upper end plate delivering superheated steam of said first fluid at an outlet collector, said shell being provided respectively in its upper part with an inlet and in its lower part with an outlet for a second fluid, so that, in use, said second fluid is flowing downwardly in counterflow of the first fluid flowing in the tube bundle, said shell being provided with horizontal baffles dividing the enclosure in several floors vertically superimposed, characterised in that said shell also comprises a central cylindrical baffle having closed ends, forming at each floor a ringed space run through by the second fluid, said tubes being arranged in the shell externally the central cylindrical baffle, with passages designed between two contiguous floors, so that the second fluid alternately flows in reverse rotation in said two contiguous floors.
  • the vertical heat exchanger/evaporator also comprises one or a suitable combination of the following characteristics :
  • FIG.1 schematically represents a longitudinal cross-sectional view of the heat exchanger according to the invention.
  • FIG.2 schematically represents three transverse cross-sectional views of the heat exchanger of FIG. 1 .
  • the object of the invention is a heat exchanger, as depicted in FIG. 1 , having reciprocating flow in which the tubes 2 of the heat exchanger 1 are run through by water/steam.
  • the amount of tubes 2 depends on the flow of steam taken into consideration, on its pressure and on its chosen temperature. All the tubes 2, making a bundle, are installed in parallel, vertically, and are "once-through"-designed, between an inlet collector 3 and an outlet collector 4.
  • the tubes 2 are advantageously provided with transverse or longitudinal fins (not shown) arranged in a spiral in order to increase the surface of external exchange, which is in contact with the thermal fluid.
  • the whole bundle of tubes is contained in a vertical essentially cylindrical enclosure (or envelope or shell) 9, run through by the thermal fluid.
  • a shape of the enclosure departing to some extent from the strictly cylindrical shape can also come within the scope of the invention.
  • the cylindrical enclosure comprises horizontal baffles 5, dividing the cylindrical enclosure in different floors 7.
  • the baffles 5 each comprise an opening allowing the passage of the thermal fluid.
  • a cylindrical baffle 6 with a closed end is installed at the centre of the cylinder 9, thus forming a ring space which will be run through by the fluid.
  • the tubes 2 are preferably arranged in circles within the cylinder 9, except for two zones 8 (or 8', 8") which are dedicated to the passage of the fluid from one floor 7 to another (see FIG. 2 ).
  • the thermal fluid runs through the bundle of tubes 2 horizontally at each floor 7 with an essentially horizontal velocity vector, then goes to the next floor 7', 7'', 7''', etc. and, in reverse rotation, i.e. in alternately clockwise and counterclockwise rotation from one floor 7 to the next one, runs again through the bundle of tubes and so on.
  • the water inlet collector 3 comprises an expansion joint 10 in order to allow the differential expansion between the tubes of the bundle and the cylindrical enclosure 9. Furthermore, the junction (tubes) 11 between the collectors and the tubes of the bundle can comprise a lyre of flexibility (not shown) in order to allow for the possible differential expansion between the tubes.
  • the conception of the exchanger according to the present invention allows the use of tubes with fins (not shown), so that to optimize thermal exchange.

Landscapes

  • 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)
EP11191611.0A 2011-12-01 2011-12-01 Vertikaler Wärmetauscher Withdrawn EP2600092A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11191611.0A EP2600092A1 (de) 2011-12-01 2011-12-01 Vertikaler Wärmetauscher
BE2012/0075A BE1020494A3 (fr) 2011-12-01 2012-02-07 Echangeur a flux alternatif.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11191611.0A EP2600092A1 (de) 2011-12-01 2011-12-01 Vertikaler Wärmetauscher

Publications (1)

Publication Number Publication Date
EP2600092A1 true EP2600092A1 (de) 2013-06-05

Family

ID=45954220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11191611.0A Withdrawn EP2600092A1 (de) 2011-12-01 2011-12-01 Vertikaler Wärmetauscher

Country Status (2)

Country Link
EP (1) EP2600092A1 (de)
BE (1) BE1020494A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2886999A1 (de) * 2013-12-18 2015-06-24 Casale Sa Rohrbündelwärmeübertrager und Mantel mit polygonalem Querschnitt

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB897593A (en) * 1959-03-10 1962-05-30 Ver Economiser Werke G M B H Improvements in and relating to heat exchangers
US3247897A (en) * 1964-02-25 1966-04-26 Babcock & Wilcox Co Differential expansion compensating apparatus
FR2077865A1 (en) * 1970-02-19 1971-11-05 Trepaud Georges Cylindrical heat exchanger - with twin helical passages surrounding central tube bundle
US3628507A (en) 1968-12-14 1971-12-21 Progettazioni Meccaniche Nucle Liquid metal heated steam generators and superheaters
FR2293684A2 (fr) * 1974-12-05 1976-07-02 Trepaud Georges Echangeur de chaleur a faisceau tubulaire
EP0246486A1 (de) * 1986-05-06 1987-11-25 STEIN INDUSTRIE Société Anonyme dite: Austauscher für Luftaufwärmung unter Druck im Gegenstrom mit in Rohrbündeln zirkulierenden Rauchgasen
US20030116306A1 (en) 2001-12-26 2003-06-26 Besik Ferdinand K. Rotating film shell and tube type heat exchanger - evaporator
US20050098307A1 (en) * 2003-06-11 2005-05-12 Usui Kokusai Sangyo Kaisha Limited Gas cooling device
CN200993535Y (zh) 2006-12-26 2007-12-19 卢秉威 改进的立式汽－水换热器结构
WO2009148822A2 (en) 2008-06-05 2009-12-10 Lummus Technology Inc. Vertical combined feed/effluent heat exchanger with variable baffle angle

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB897593A (en) * 1959-03-10 1962-05-30 Ver Economiser Werke G M B H Improvements in and relating to heat exchangers
US3247897A (en) * 1964-02-25 1966-04-26 Babcock & Wilcox Co Differential expansion compensating apparatus
US3628507A (en) 1968-12-14 1971-12-21 Progettazioni Meccaniche Nucle Liquid metal heated steam generators and superheaters
FR2077865A1 (en) * 1970-02-19 1971-11-05 Trepaud Georges Cylindrical heat exchanger - with twin helical passages surrounding central tube bundle
FR2293684A2 (fr) * 1974-12-05 1976-07-02 Trepaud Georges Echangeur de chaleur a faisceau tubulaire
EP0246486A1 (de) * 1986-05-06 1987-11-25 STEIN INDUSTRIE Société Anonyme dite: Austauscher für Luftaufwärmung unter Druck im Gegenstrom mit in Rohrbündeln zirkulierenden Rauchgasen
US20030116306A1 (en) 2001-12-26 2003-06-26 Besik Ferdinand K. Rotating film shell and tube type heat exchanger - evaporator
US20050098307A1 (en) * 2003-06-11 2005-05-12 Usui Kokusai Sangyo Kaisha Limited Gas cooling device
CN200993535Y (zh) 2006-12-26 2007-12-19 卢秉威 改进的立式汽－水换热器结构
WO2009148822A2 (en) 2008-06-05 2009-12-10 Lummus Technology Inc. Vertical combined feed/effluent heat exchanger with variable baffle angle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2886999A1 (de) * 2013-12-18 2015-06-24 Casale Sa Rohrbündelwärmeübertrager und Mantel mit polygonalem Querschnitt
WO2015091442A1 (en) * 2013-12-18 2015-06-25 Casale Sa Shell and tube heat exchanger with a shell having a polygonal section
US9919281B2 (en) 2013-12-18 2018-03-20 Casale Sa Shell and tube heat exchanger with a shell having a polygonal section

Also Published As

Publication number Publication date
BE1020494A3 (fr) 2013-11-05

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