EP0864834B1 - Wärmetauscher mit dichter Wirbelschicht kombiniert mit einem Reaktor mit zirkulierender Wirbelschicht - Google Patents

Wärmetauscher mit dichter Wirbelschicht kombiniert mit einem Reaktor mit zirkulierender Wirbelschicht Download PDF

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Publication number
EP0864834B1
EP0864834B1 EP98400585A EP98400585A EP0864834B1 EP 0864834 B1 EP0864834 B1 EP 0864834B1 EP 98400585 A EP98400585 A EP 98400585A EP 98400585 A EP98400585 A EP 98400585A EP 0864834 B1 EP0864834 B1 EP 0864834B1
Authority
EP
European Patent Office
Prior art keywords
wall
tubes
heat exchanger
fluidized bed
box
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
EP98400585A
Other languages
English (en)
French (fr)
Other versions
EP0864834A1 (de
Inventor
Jean Aubry
Djamel Daoud
Alain Quaranta
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.)
Alstom Power Boiler SA
Original Assignee
Alstom Power Boiler 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 Alstom Power Boiler SA filed Critical Alstom Power Boiler SA
Publication of EP0864834A1 publication Critical patent/EP0864834A1/de
Application granted granted Critical
Publication of EP0864834B1 publication Critical patent/EP0864834B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
    • F22B31/0023—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type with tubes in the bed
    • 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
    • F28D13/00—Heat-exchange apparatus using a fluidised bed

Definitions

  • the present invention relates to a dense fluidized bed exchanger to be associated with a circulating fluidized bed reactor.
  • a dense fluidized bed exchanger comprising a box whose vertical longitudinal walls consist of tubes carrying a heat transfer fluid and divided in the direction of its length in separate chambers from each other by a spill wall constituted a wall consisting of tubes carrying a heat transfer fluid.
  • Such an exchanger is generally intended for a combustion plant comprising a circulating fluidized-bed exchanger comprising a gas outlet opening into a separation cyclone whose recovered solids are treated in this dense fluidized bed before being at least partially reinjected into the circulating fluidized-bed exchanger.
  • the intermediate chamber is equipped with a lower fluidization air supply box, fluidization air injection nozzles arranged on the lower wall of the chamber and a heat exchanger generally consisting of a plurality of parallel arrangements of tubes carrying a coolant, for example steam, arranged transversely to the chamber and suspended from the upper wall of the chamber, each tube arrangement being connected in the lower part to an inlet manifold of the heat transfer fluid and in the upper part to an outlet manifold of this heated fluid.
  • a coolant for example steam
  • Such known walls consist of walls of vertical tubes extending over the entire height of the box and having windows distributed over their width at the desired discharge height.
  • This spill arrangement does not allow the passage of solids over the entire width of the box and, the windows to be of clean width limited given the continuity of the vertical tubes from the bottom of the wall to the top of it, this The arrangement does not allow continuous and optimal flow of solids from one chamber to another.
  • the invention solves this problem by proposing a tube wall arrangement which can be achieved over a given height and thus allows a continuous and undisturbed discharge of the solids above the wall.
  • said vertical longitudinal faces consist of horizontal tubes and said wall consists of transverse and superimposed extensions of tubes of each of the vertical longitudinal faces, in the form of a hairpin, perpendicular to said tubes and extending to the opposite vertical longitudinal face.
  • these extensions are vertically alternating from one face to the other, to allow mechanical stability and flow balancing of the heat transfer fluid.
  • the wall consisting of a double cased wall is internally reinforced with spacers.
  • one tube out of two of each vertical wall comprises such an extension directed towards the other wall and between two such extensions, is intercalated an extension of the other wall which is on the same horizontal plane as the tube of the other wall having no extension.
  • the upper part of the wall is shaped as a bevel of reducing section.
  • the figure 1 is a schematic perspective view of a dense fluidized bed exchanger box.
  • the figure 2 is a perspective view of detail of an exchanger according to the invention.
  • the figure 3 is a partial sectional view along II-II of the figure 2 .
  • the figure 4 is a partial perspective view, partially broken away, of an exchanger according to the invention.
  • the vertical longitudinal walls 1A, 1B consist of horizontal tubes 11A, 12A and 11B, 12B.
  • the wall 10 consists of transverse and superposed extensions of tubes 11A, 11B of each of the vertical longitudinal walls 1A, 1B, in the form of a hairpin, perpendicular to said tubes and extending to the opposite vertical longitudinal face 1B, 1A.
  • a tube on two 11A, 11B of each vertical wall 1A, 1B has such an extension directed towards the other wall 1B, 1A. Between two such extensions, is intercalated an extension of the other wall 1B, 1A which is on the same horizontal plane as the tube 12A, 12B of the other wall 1A, 1B having no extension.
  • the upper part of the wall 10 is shaped as a bevel of reducing section.
  • metal fins close the walls of tubes thus formed connecting all the adjacent tubes and the wall is covered externally with a layer of concrete 13 ( figures 3 ).
  • This tube structure is mechanically reinforced by spacers arranged inside the wall.
  • the upper part of the wall 10 is visible on the figure 3 in cross section.
  • a high spacer 14 is shown on the figure 3 . It is a bar welded between the two branches of the hairpin of an extension. Such spacers 14 are distributed over the height of the upper part and on the width of the wall, to obtain the desired mechanical stability.
  • This bottom wall called hearth also consists of horizontal tubes and, more specifically, an upper wall 15 consisting of tubes connected by horizontal fins. To each tube of this wall and below this, is connected another tube 16 by a vertical vane 17. Two tie rods 18 arranged at the right of the wall and longitudinally thereto, are welded to the floor, passing through the vertical fins 17. Connected to these tie rods 18, are placed spacers 19 of a maximum height equal to the height of the constant section portion of the wall and consist of a plate or equivalent having laterally notches receiving the tubes of extensions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Claims (5)

  1. Wärmetauscher mit dichter Wirbelschicht, der ein Gehäuse (1) aufweist, dessen senkrechte Längswände (1A, 1B) aus ein Wärmeträgerfluid transportierenden Rohren bestehen, und der in Richtung seiner Länge in Kammern aufgeteilt ist, die voneinander durch eine halbhohe Überlauf-Trennwand (10) getrennt werden, die aus einer Wand besteht, die aus ein Wärmeträgerfluid transportierenden Rohren besteht, dadurch gekennzeichnet, dass die senkrechten Längswände (1A, 1B) aus waagrechten Rohren (11A, 11B, 12A, 12B) bestehen, und die halbhohe Trennwand sich ausgehend von der unteren Wand des Gehäuses (1) über eine Höhe erstreckt, die geringer ist als seine Höhe, und aus quer verlaufenden und übereinanderliegenden Verlängerungen von Rohren (11A, 11B) jeder der senkrechten Längsseiten (1A, 1B) in Form von Haarnadeln besteht, die zu den Rohren lotrecht sind und sich bis zur gegenüberliegenden senkrechten Längsseite (1B, 1A) erstrecken.
  2. Wärmetauscher mit dichter Wirbelschicht nach Anspruch 1, dadurch gekennzeichnet, dass diese Verlängerungen sich senkrecht von einer Seite zur anderen abwechseln.
  3. Wärmetauscher mit dichter Wirbelschicht nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die aus einer doppelten Rohrwand bestehende halbhohe Trennwand innen von Abstandshaltern (14, 19) verstärkt wird.
  4. Wärmetauscher mit dichter Wirbelschicht nach Anspruch 2, dadurch gekennzeichnet, dass jedes zweite Rohr (11A, 11B) jeder senkrechten Wand (1A, 1B) eine solche zur anderen Wand (1B, 1A) gerichtete Verlängerung aufweist, und dass sich zwischen zwei solche Verlängerungen eine Verlängerung der anderen Wand (1B, 1A) einfügt, die sich auf der gleichen waagrechten Ebene befindet wie das Rohr (12A, 12B) der anderen Wand (1A, 1B), das keine Verlängerung aufweist.
  5. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der obere Teil der Trennwand abgeschrägt mit abnehmenden Querschnitt gestaltet ist.
EP98400585A 1997-03-13 1998-03-12 Wärmetauscher mit dichter Wirbelschicht kombiniert mit einem Reaktor mit zirkulierender Wirbelschicht Expired - Lifetime EP0864834B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9702991A FR2760829B1 (fr) 1997-03-13 1997-03-13 Echangeur a lit fluidise dense destine a etre associe a un reacteur a lit fluidise circulant
FR9702991 1997-03-13

Publications (2)

Publication Number Publication Date
EP0864834A1 EP0864834A1 (de) 1998-09-16
EP0864834B1 true EP0864834B1 (de) 2009-06-17

Family

ID=9504700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98400585A Expired - Lifetime EP0864834B1 (de) 1997-03-13 1998-03-12 Wärmetauscher mit dichter Wirbelschicht kombiniert mit einem Reaktor mit zirkulierender Wirbelschicht

Country Status (9)

Country Link
US (1) US5979367A (de)
EP (1) EP0864834B1 (de)
JP (1) JPH10318686A (de)
CN (1) CN1100600C (de)
AT (1) ATE434164T1 (de)
CA (1) CA2230098A1 (de)
DE (1) DE69840901D1 (de)
FR (1) FR2760829B1 (de)
ZA (1) ZA982102B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2884900B1 (fr) * 2005-04-26 2007-11-30 Alstom Technology Ltd Reacteur a lit fluidise avec double extension de paroi
CN101922874B (zh) * 2010-06-22 2012-07-18 四川金象赛瑞化工股份有限公司 组合式换热器及流化床反应器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893426A (en) * 1974-03-25 1975-07-08 Foster Wheeler Corp Heat exchanger utilizing adjoining fluidized beds
US4173950A (en) * 1978-07-03 1979-11-13 Combustion Engineering, Inc. Coal fired fluid bed module for a single elevation style fluid bed power plant
FI97315C (fi) * 1990-09-26 1996-11-25 Stein Industrie Leijukerroskattilan tulipesäseinämän jäähdytyslaitteisto
DE4135582A1 (de) * 1991-10-29 1993-05-06 Metallgesellschaft Ag, 6000 Frankfurt, De Wirbelbettkuehler fuer eine anlage zum thermischen behandeln koerniger feststoffe in der wirbelschicht

Also Published As

Publication number Publication date
CN1197689A (zh) 1998-11-04
DE69840901D1 (de) 2009-07-30
CA2230098A1 (fr) 1998-09-13
US5979367A (en) 1999-11-09
JPH10318686A (ja) 1998-12-04
ATE434164T1 (de) 2009-07-15
CN1100600C (zh) 2003-02-05
ZA982102B (en) 1998-10-21
EP0864834A1 (de) 1998-09-16
FR2760829A1 (fr) 1998-09-18
FR2760829B1 (fr) 1999-05-14

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