EP1490629B1 - Foyer de chaudiere a lit fluidise comprenant deux soles separees par un entrejambe - Google Patents

Foyer de chaudiere a lit fluidise comprenant deux soles separees par un entrejambe Download PDF

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Publication number
EP1490629B1
EP1490629B1 EP03727571A EP03727571A EP1490629B1 EP 1490629 B1 EP1490629 B1 EP 1490629B1 EP 03727571 A EP03727571 A EP 03727571A EP 03727571 A EP03727571 A EP 03727571A EP 1490629 B1 EP1490629 B1 EP 1490629B1
Authority
EP
European Patent Office
Prior art keywords
tubes
panel
crotch
panels
fluidized bed
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
EP03727571A
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German (de)
English (en)
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EP1490629A1 (fr
Inventor
Christian Enault
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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 Technology AG filed Critical Alstom Technology AG
Publication of EP1490629A1 publication Critical patent/EP1490629A1/fr
Application granted granted Critical
Publication of EP1490629B1 publication Critical patent/EP1490629B1/fr
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
    • F22B31/0015—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
    • F22B31/003—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 surrounding the bed or with water tube wall partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/005—Fluidised bed combustion apparatus comprising two or more beds

Definitions

  • the invention relates to a furnace for a fluidized bed boiler comprising two soles separated by a crotch at the bottom of the furnace, and at least one panel of heat exchange tubes.
  • a fireplace of the type indicated above for a circulating fluidized bed boiler is known in particular from the patent application.
  • EP-A-0 477 849 It is known to install inside a fluidized bed boiler furnace one or more panels of heat exchange tubes traversed by a heat transfer fluid such as water or an emulsion of water and steam - as described for example in the document WO-A-98,25074 .
  • Each panel of tubes is arranged conventionally perpendicular to the side walls of the fireplace by being fixed or not.
  • a hearth comprising two soles separated by a crotch
  • such an arrangement has the disadvantage of limiting the number of panels that can be installed on the side walls of the fireplace without hindering the flow of particles to the cyclones provided on these side walls.
  • the object of the invention is to propose another arrangement of heat exchange tube panels that takes advantage of the structure of a fireplace having in its lower part a crotch.
  • the furnace for a fluidized bed boiler according to the invention is characterized in that the panel of heat exchange tubes is disposed vertically above said crotch and perpendicular to the longitudinal direction of said soles. In this way, it does not interfere with the load balance in the home.
  • a plurality of panels may be arranged in a row on the top of the crotch being spaced regularly from each other in said longitudinal direction so as to leave sufficient circulation space for the particles does not create pressure imbalances at the same time. inside the fireplace.
  • the tubes forming a panel are an extension of the tubes forming the crotch which prevents the formation of crossings in the crotch.
  • a fireplace according to the invention may also comprise an alternation of panels whose tubes are an extension of the tubes forming the crotch and panels whose tubes are connected to a collector disposed under the crotch. So there will be panels powered by the fluid flowing in the walls of the fireplace and panels fed either by the same fluid or by another heat transfer fluid.
  • each panel of tubes is fixed to the ceiling of the hearth so that the panel of tubes can, if necessary, be placed in tension between the crotch and the ceiling of the hearth to limit the vibrations produced by the circulation of the fluid. the tubes of the panels.
  • the figure 1 is a very schematic view of a fireplace according to the invention in longitudinal section showing a panel of tubes disposed on the crotch of the hearth.
  • the figure 2 is a very schematic view of the top of the fireplace showing the arrangement of several panels of tubes on the crotch of the hearth.
  • the figure 3 illustrates very schematically the formation of a panel of tubes with the tubes forming the crotch of the hearth.
  • the fireplace shown on the figure 1 is a furnace for circulating fluidized bed (CFL) boiler whose lower part forms a crotch 1 separating two soles 2.3 from the hearth. Outputs from the fireplace to cyclones are indicated by references 4,5.
  • the exits to the cyclones are usually arranged on the side walls of the hearth and a crotch fire may have four or more outlets to the cyclones disposed on either side of the crotch.
  • the fireplace according to the invention is equipped with at least one panel 6 of heat exchange tubes which is arranged vertically on the top of the crotch 1 and perpendicularly to the longitudinal direction A of the soles 2 and 3 which does not interfere not the flow of gases and particles indicated by the arrows GP and does not create pressure imbalance in the home.
  • Each panel 6 of heat exchange tubes is fixed to the ceiling 7 of the fireplace and is placed in tension between the ceiling and the crotch to prevent the unwanted vibrations of the tubes of the panel during operation of the fireplace.
  • FIG. 1 there is shown an inlet manifold 8 placed under the crotch 6 and an outlet manifold 9 placed on top of the ceiling 7 of the hearth to which the tubes of the panel 6 are connected.
  • a large number of panels 6 of tubes can be arranged in a row on the top of the crotch 1 being regularly spaced from each other along the crotch 1.
  • the tubes forming the heat exchange panels 6 may be an extension of the tubes forming the crotch of the hearth. It is also possible to have an alternation of panels 6 whose tubes are an extension of the tubes forming the crotch of the fireplace and panels whose tubes are connected to the inlet manifold 8.
  • the figure 3 illustrates a panel 6A (seen from above), the tubes 10 are an extension of the tubes 11 forming the crotch 1 and a panel 6B (seen from above), the tubes 12 are connected to the inlet manifold 8 (not shown).
  • the topology of the tubes forming the crotch 1 shown on the figure 3 is only an example of the invention.
  • the arrangement of the panels 6 according to the invention is suitable both for a crotch plane as illustrated on the figure 1 that an inverted V-shaped crotch. Furthermore, in the example shown, the outputs 4.5 to the cyclones are located on the side faces 13,14; they could be located on the transverse side faces 15 and 16

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Radio Relay Systems (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Information Transfer Between Computers (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

  • L'invention concerne un foyer de chaudière à lit fluidisé comprenant deux soles séparées par un entrejambe à la partie inférieure du foyer, et au moins un panneau de tubes d'échange de chaleur.
  • Un foyer du genre indiqué ci-dessus pour chaudière à lit fluidisé circulant est connu notamment de la demande de brevet EP-A-0 477 849 . Il est connu d'installer à l'intérieur d'un foyer de chaudière à lit fluidisé un ou plusieurs panneaux de tubes d'échange de chaleur parcourus par un fluide caloporteur comme de l'eau ou une émulsion d'eau et de vapeur - tel que decrit par exemple dans le document WO-A-98 25074 . Chaque panneau de tubes est disposé conventionnellement perpendiculairement aux parois latérales du foyer en y étant fixé ou non. Toutefois, pour le cas d'un foyer comprenant deux soles séparées par un entrejambe, une telle disposition a pour inconvénient de limiter le nombre de panneaux pouvant être installés sur les parois latérales du foyer sans entraver la circulation des particules vers les cyclones prévues sur ces parois latérales.
  • L'objet de l'invention est de proposer une autre disposition des panneaux de tubes d'échange de chaleur qui tire profit de la structure d'un foyer ayant dans sa partie inférieure un entrejambe.
  • Le foyer pour chaudière à lit fluidisé selon l'invention est caractérisé en ce que le panneau de tubes d'échange de chaleur est disposé verticalement au-dessus dudit entrejambe et perpendiculairement à la direction longitudinale desdites soles. De cette façon, ça ne gène pas l'équilibre de la charge dans le foyer. Une pluralité de panneaux peuvent être disposés en une rangée sur le dessus de l'entrejambe en étant espacés régulièrement les uns des autres selon ladite direction longitudinale de manière à laisser des espaces de circulation suffisants pour les particules ne créant pas de déséquilibres de pression à l'intérieur du foyer.
  • Dans un mode de réalisation particulier du foyer selon l'invention, les tubes formant un panneau sont le prolongement des tubes formant l'entrejambe ce qui évite la formation de traversées dans l'entrejambe. Un foyer selon l'invention peut également comprendre une alternance de panneaux dont les tubes sont le prolongement des tubes formant l'entrejambe et de panneaux dont les tubes sont raccordés à un collecteur disposé sous l'entrejambe. Il y aura donc des panneaux alimentés par le fluide circulant dans les parois du foyer et des panneaux alimentés soit par le même fluide soit par un autre fluide caloporteur.
  • De préférence, chaque panneau de tubes est fixé au plafond du foyer de telle manière que le panneau de tubes puisse, si nécessaire, être mis en traction entre l'entrejambe et le plafond du foyer pour limiter les vibrations produites par la circulation du fluide des les tubes des panneaux.
  • Il est décrit ci-après, à titre d'exemple et en référence aux figures schématiques du dessin annexé, un foyer pour chaudière à lit fluidisé selon l'invention.
  • La figure 1 est une vue très schématique d'un foyer selon l'invention en coupe longitudinale montrant un panneau de tubes disposé sur l'entrejambe du foyer.
  • La figure 2 est une vue très schématique du dessus du foyer montrant la disposition de plusieurs panneaux de tubes sur l'entrejambe du foyer.
  • La figure 3 illustre de façon très schématique la formation d'un panneau de tubes avec les tubes formant l'entrejambe du foyer.
  • Le foyer illustré sur la figure 1 est un foyer pour chaudière à lit fluidisé circulant (LFC) dont la partie inférieure forme un entrejambe 1 séparant deux soles 2,3 du foyer. Les sorties du foyer vers des cyclones sont indiquées par les références 4,5. Les sorties vers les cyclones sont habituellement disposées sur les parois latérales du foyer et un foyer à entrejambe peut comporter quatre ou plus sorties vers les cyclones disposées de part et d'autre de l'entrejambe.
  • Le foyer selon l'invention est équipé d'au moins un panneau 6 de tubes d'échange de chaleur qui est disposé verticalement sur le dessus de l'entrejambe 1 et perpendiculairement à la direction longitudinale A des soles 2 et 3 ce qui ne gêne pas la circulation des gaz et particules indiquée par les flèches GP et ne crée pas de déséquilibre de pression dans le foyer. Chaque panneau 6 de tubes d'échange de chaleur est fixé au plafond 7 du foyer et est mis en traction entre le plafond et l'entrejambe pour éviter les vibrations intempestives des tubes du panneau lors du fonctionnement du foyer.
  • Sur la figure 1, on a représenté un collecteur d'entrée 8 placé sous l'entrejambe 6 et un collecteur de sortie 9 placé sur le dessus du plafond 7 du foyer auxquels sont raccordés les tubes du panneau 6.
  • Comme visible sur la figure 2, un grand nombre de panneaux 6 de tubes peuvent être disposés en rangée sur le dessus de l'entrejambe 1 en étant espacés régulièrement les uns des autres le long de l'entrejambe 1.
  • Les tubes formant les panneaux 6 d'échange de chaleur peuvent être le prolongement des tubes formant l'entrejambe du foyer. Il est également possible d'avoir une alternance de panneaux 6 dont les tubes sont le prolongement des tubes formant l'entrejambe du foyer et de panneaux dont les tubes sont raccordés au collecteur d'entrée 8. La figure 3 illustre un panneau 6A (vu de dessus) dont les tubes 10 sont le prolongement des tubes 11 formant l'entrejambe 1 et un panneau 6B (vu de dessus) dont les tubes 12 sont raccordés au collecteur d'entrée 8 (non représenté). Bien entendu, la topologie des tubes formant l'entrejambe 1 montrée sur la figure 3 n'est qu'un exemple de l'invention. La disposition des panneaux 6 selon l'invention convient tant pour un entrejambe plan comme illustré sur la figure 1 qu'un entrejambe en forme de V inversé. Par ailleurs, dans l'exemple représenté, les sorties 4,5 vers les cyclones sont situées sur les faces latérales 13,14 ; elles pourraient être situées sur les faces latérales transversales 15 et 16

Claims (5)

  1. Un foyer de chaudière à lit fluidisé comprenant deux soles (2,3) séparées par un entrejambe (1) à la partie inférieure du foyer, et au moins un panneau (6) de tubes d'échange de chaleur, caractérisé en ce que le panneau de tubes est disposé verticalement au-dessus dudit entrejambe et perpendiculairement à la direction longitudinale (A) des dites soles.
  2. Le foyer selon la revendication 1, comprenant une rangée de panneaux (6) de tubes espacés régulièrement les uns des autres selon ladite direction longitudinale.
  3. Le foyer selon l'une des revendications 1 ou 2, dans lequel les tubes formant un panneau (6A) sont le prolongement des tubes formant l'entrejambe.
  4. Le foyer selon la revendication 1 à 3, comprenant une alternance de panneaux (6A) dont les tubes sont le prolongement des tubes formant l'entrejambe et de panneaux (6B) dont les tubes sont raccordés à un collecteur (8) disposé sous l'entrejambe.
  5. Le foyer selon l'une des revendications 1 à 4, comprenant un plafond (7) auquel est fixé chaque panneau (6,6A,6B) de tubes de telle manière que le panneau de tubes puisse être mis en traction entre l'entrejambe et le plafond du foyer.
EP03727571A 2002-03-25 2003-03-06 Foyer de chaudiere a lit fluidise comprenant deux soles separees par un entrejambe Expired - Lifetime EP1490629B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0203698A FR2837561B1 (fr) 2002-03-25 2002-03-25 Foyer de chaudiere a lit fluidise comprenant deux soles separees par un entrejambe
FR0203698 2002-03-25
PCT/FR2003/000715 WO2003081128A1 (fr) 2002-03-25 2003-03-06 Foyer de chaudière a lit fluidise comprenant deux soles séparées par un entrejambe

Publications (2)

Publication Number Publication Date
EP1490629A1 EP1490629A1 (fr) 2004-12-29
EP1490629B1 true EP1490629B1 (fr) 2008-11-12

Family

ID=27799240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03727571A Expired - Lifetime EP1490629B1 (fr) 2002-03-25 2003-03-06 Foyer de chaudiere a lit fluidise comprenant deux soles separees par un entrejambe

Country Status (11)

Country Link
US (1) US7152537B2 (fr)
EP (1) EP1490629B1 (fr)
CN (1) CN1283950C (fr)
AT (1) ATE414242T1 (fr)
AU (1) AU2003233363A1 (fr)
BR (1) BR0303655A (fr)
CA (1) CA2480020A1 (fr)
DE (1) DE60324667D1 (fr)
ES (1) ES2316752T3 (fr)
FR (1) FR2837561B1 (fr)
WO (1) WO2003081128A1 (fr)

Families Citing this family (4)

* 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
CN101696798B (zh) * 2009-05-18 2011-05-04 西安热工研究院有限公司 带有异型分隔墙的紧凑型循环流化床锅炉
CN102226518B (zh) * 2011-02-01 2013-03-06 中国科学院工程热物理研究所 大型循环流化床锅炉
ES2637364T3 (es) * 2012-03-20 2017-10-13 General Electric Technology Gmbh Caldera de lecho fluidizado circulante

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387590A (en) * 1967-03-16 1968-06-11 Interior Usa System for regulating the total heat output in a burning fluidized bed heat exchanger or boiler
US3893426A (en) * 1974-03-25 1975-07-08 Foster Wheeler Corp Heat exchanger utilizing adjoining fluidized beds
US4184455A (en) * 1978-04-10 1980-01-22 Foster Wheeler Energy Corporation Fluidized bed heat exchanger utilizing angularly extending heat exchange tubes
US4314967A (en) * 1980-10-02 1982-02-09 Dorr-Oliver Incorporated Fluidized bed reactor with vertical cooling coils
FI97315C (fi) * 1990-09-26 1996-11-25 Stein Industrie Leijukerroskattilan tulipesäseinämän jäähdytyslaitteisto
US5836257A (en) * 1996-12-03 1998-11-17 Mcdermott Technology, Inc. Circulating fluidized bed furnace/reactor with an integral secondary air plenum
US6532905B2 (en) * 2001-07-17 2003-03-18 The Babcock & Wilcox Company CFB with controllable in-bed heat exchanger

Also Published As

Publication number Publication date
WO2003081128A1 (fr) 2003-10-02
US7152537B2 (en) 2006-12-26
ES2316752T3 (es) 2009-04-16
CA2480020A1 (fr) 2003-10-02
CN1643302A (zh) 2005-07-20
US20050092219A1 (en) 2005-05-05
DE60324667D1 (de) 2008-12-24
AU2003233363A1 (en) 2003-10-08
ATE414242T1 (de) 2008-11-15
BR0303655A (pt) 2004-07-13
FR2837561B1 (fr) 2004-05-21
EP1490629A1 (fr) 2004-12-29
FR2837561A1 (fr) 2003-09-26
CN1283950C (zh) 2006-11-08

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