EP0852314B1 - Zirkulierende Wirbelschichtfeuerung mit verbessertem Herd - Google Patents

Zirkulierende Wirbelschichtfeuerung mit verbessertem Herd Download PDF

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Publication number
EP0852314B1
EP0852314B1 EP97403176A EP97403176A EP0852314B1 EP 0852314 B1 EP0852314 B1 EP 0852314B1 EP 97403176 A EP97403176 A EP 97403176A EP 97403176 A EP97403176 A EP 97403176A EP 0852314 B1 EP0852314 B1 EP 0852314B1
Authority
EP
European Patent Office
Prior art keywords
hearth
sole
floor
fluidized bed
circulating fluidized
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
EP97403176A
Other languages
English (en)
French (fr)
Other versions
EP0852314A1 (de
Inventor
Jean Aubry
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 Energy Systems 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 Energy Systems SA filed Critical Alstom Energy Systems SA
Publication of EP0852314A1 publication Critical patent/EP0852314A1/de
Application granted granted Critical
Publication of EP0852314B1 publication Critical patent/EP0852314B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • 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
    • F23C10/18—Details; Accessories
    • F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
    • 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 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/101—Entrained or fast fluidised bed

Definitions

  • the invention relates to a fireplace for a circulating fluidized bed boiler, comprising a sole formed by a set of tubes. These tubes are intended to be connected to the inlet and outlet manifolds of a heat transfer fluid.
  • the efficiency of fluidization of solids at the bottom of the hearth is a function of the shape of the sole and subsequently the shape of the screens forming the junction between this hearth and the upper part of the hearth.
  • the sole has a form essentially rectangular, square or circular.
  • Document EP-A-0349030 describes a circulating fluidized bed reactor in which one or more separating elements are placed at the interior of the fireplace, at its base, so as to have a unique background of focus, in several segments, but communicating with each other other.
  • the outer perimeter of the fireplace, at its base, is rectangular.
  • the object of the invention is to provide a hearth for a bed boiler fluidized with an improved shaped bottom allowing to increase the number of connections that can be made on its external perimeter, while taking into account the production constraints indicated above.
  • the subject of the invention is therefore a hearth for a fluidized bed boiler circulating, comprising a sole made up of a set of sole smaller elementaries each having a shape substantially rectangular, these elementary sole being juxtaposed with such that the hearth floor is in one piece, characterized in that it is formed by a set of tubes and that it has a surface section whose external perimeter results from the use a combination of vertical hearth faces inclined towards the interior by producing a sole whose external perimeter defined by more than four sides, has inside corners.
  • the sole has a H-shaped surface section particularly suitable for fireplaces whose upper section is rectangular or square.
  • the sole has a section cross-shaped surface particularly suitable for homes whose upper section is octagonal.
  • Figure 1 very schematically shows a bed boiler hearth fluidized with an H-shaped sole
  • FIG. 2 shows in more detail the realization of the hearth and its hearth using tubes.
  • Figure 3 very schematically shows a bed boiler hearth fluidized with a cross-shaped sole.
  • FIG. 1 the top 1 of a fireplace for a CFL boiler presents here a rectangular section.
  • This hearth comprises a hearth 4 formed by a set of tubes 5 connected to fluid inlet and outlet manifolds such as 6.
  • Sole 4 is consisting of a set of elementary sole 4A, 4B, 4C of smaller size each having a substantially rectangular shape. These smaller soles 4A, 4B, 4C are juxtaposed edge to edge and constitute a sole 4 in a single room.
  • the surface section of the sole has a perimeter which is defined here by 12 sides which increases the number of connections that can be made on the perimeter of the sole in relation to an equivalent surface sole but rectangular in shape with 4 sides.
  • FIG 2 we partially see the focal point of Figure 1.
  • the vertical screens as 2 and inclined as 3 are made by an assembly of tubes 5 to fins welded together to form a tight wall. They are powered by the collectors 6.
  • the tubes 5 are connected to the collectors 6 and bent so as to form a sealed wind box which allows the primary air supply of the hearth and also to form the hearth 4 of the hearth H-shaped
  • the junction between the hearth 4 and the top of the rectangular hearth is still provided by the tubes 5 which are assembled with more or less spacing less important between them.
  • the cased sides are protected inside the fireplace with a layer of refractory concrete 7.
  • the hearth 4 of the hearth is constituted by a set of elementary sole 4'A, 4'B, 4'C, 4'D, 4'E of form substantially rectangular.
  • the elementary soles 4'A to 4'E are juxtaposed edge to edge to form the sole 4.
  • the sole 4 has a surface section in form of cross, the perimeter of which is further defined by 12 sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Dairy Products (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Claims (3)

  1. Zirkulierende Wirbelschichtfeuerung mit einem Herd (4), der aus einer Anordnung von kleineren Elementarherden (4A bis 4C; 4'A bis 4'E) mit einer im Wesentlichen rechteckige Form gebildet ist, wobei die Elementarherde so nebeneinander liegen, dass der Herd (4) der Feuerung einstückig ist, dadurch gekennzeichnet, dass er aus einer Anordnung von Rohren (5) besteht und dass er einen Oberflächenquerschnitt aufweist, dessen Außenumfang sich aus einer Kombination von vertikalen (2) und nach innen geneigten (3) Kesselflächen zusammensetzt, und einen Herd (4) bildet, dessen durch mehr als vier Seiten definierter Außenumfang einspringende Winkel aufweist.
  2. Feuerung nach Anspruch 1, dadurch gekennzeichnet, dass der Herd (4) eine Querschnittsfläche in Form eines H aufweist.
  3. Feuerung nach Anspruch 1, dadurch gekennzeichnet, dass der Herd (4) eine Querschnittsfläche in Form eines Kreuzes aufweist.
EP97403176A 1997-01-02 1997-12-30 Zirkulierende Wirbelschichtfeuerung mit verbessertem Herd Expired - Lifetime EP0852314B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9700010A FR2757930B1 (fr) 1997-01-02 1997-01-02 Foyer pour chaudiere a lfc a sole amelioree
FR9700010 1997-01-02

Publications (2)

Publication Number Publication Date
EP0852314A1 EP0852314A1 (de) 1998-07-08
EP0852314B1 true EP0852314B1 (de) 2001-10-17

Family

ID=9502358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97403176A Expired - Lifetime EP0852314B1 (de) 1997-01-02 1997-12-30 Zirkulierende Wirbelschichtfeuerung mit verbessertem Herd

Country Status (6)

Country Link
EP (1) EP0852314B1 (de)
CN (1) CN1114788C (de)
ES (1) ES2165009T3 (de)
FR (1) FR2757930B1 (de)
UA (1) UA42099C2 (de)
WO (1) WO1998029688A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635855A (zh) * 2012-04-24 2012-08-15 清华大学 一种三旋风分离器的循环流化床锅炉炉膛结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE437722B (sv) * 1980-10-22 1985-03-11 Stal Laval Turbin Ab Virvelbeddsbrennkammare
DE3706538A1 (de) * 1987-02-28 1988-09-08 Metallgesellschaft Ag Wirbelschichtanlage
IN170802B (de) * 1988-06-25 1992-05-23 Metallgesellschaft Ag
FI97315C (fi) * 1990-09-26 1996-11-25 Stein Industrie Leijukerroskattilan tulipesäseinämän jäähdytyslaitteisto

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635855A (zh) * 2012-04-24 2012-08-15 清华大学 一种三旋风分离器的循环流化床锅炉炉膛结构
CN102635855B (zh) * 2012-04-24 2014-07-16 清华大学 一种三旋风分离器的循环流化床锅炉炉膛结构

Also Published As

Publication number Publication date
ES2165009T3 (es) 2002-03-01
UA42099C2 (uk) 2001-10-15
FR2757930B1 (fr) 1999-02-26
EP0852314A1 (de) 1998-07-08
CN1216606A (zh) 1999-05-12
WO1998029688A1 (fr) 1998-07-09
CN1114788C (zh) 2003-07-16
FR2757930A1 (fr) 1998-07-03

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