EP0687856B1 - Sole de foyer à lit fluidisé - Google Patents

Sole de foyer à lit fluidisé Download PDF

Info

Publication number
EP0687856B1
EP0687856B1 EP95401341A EP95401341A EP0687856B1 EP 0687856 B1 EP0687856 B1 EP 0687856B1 EP 95401341 A EP95401341 A EP 95401341A EP 95401341 A EP95401341 A EP 95401341A EP 0687856 B1 EP0687856 B1 EP 0687856B1
Authority
EP
European Patent Office
Prior art keywords
hearth
flat
hearth floor
flat elements
sheet
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
EP95401341A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0687856A1 (fr
Inventor
Sylvestre Suraniti
Jean-Xavier Morin
Frederic Maillot
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
GEC Alsthom Stein Industrie
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 GEC Alsthom Stein Industrie filed Critical GEC Alsthom Stein Industrie
Publication of EP0687856A1 publication Critical patent/EP0687856A1/fr
Application granted granted Critical
Publication of EP0687856B1 publication Critical patent/EP0687856B1/fr
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
    • F23C10/18—Details; Accessories
    • F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms

Definitions

  • the present invention relates to a hearth hearth fluidized bed.
  • Such a layer must be very thick, greater than 100 mm. This thickness affects the total height of the hearth and along the length of the fittings for supplying the fluidization nozzles.
  • the concentration of solids is indeed very high in the order of 500 to 1200 kg / m 3 .
  • the support sheet is made of metal refractory and the coating consists of a plurality flat refractory metal elements covering said sheet support, each flat element being fixed to the support sheet by welding in a substantially localized area punctual.
  • the coating thus produced protects the support sheet able to resist heat against erosion and thermal shock. Welding in just one localized area substantially punctual allows the flat elements to freely deform with regard to dilations differentials. So they are not solicited by efforts which may tend to deteriorate them.
  • the flat elements are arranged adjacent to each other.
  • each element dish is provided with an orifice in which the weld connecting it to the support sheet.
  • the orifice is located substantially at the center of the flat element.
  • the flat elements can be substantially rectangular.
  • the nozzles can be arranged aligned the to each other in the two directions of the support sheet and located at the rounded corners of the flat elements.
  • Prison support and the flat elements are preferably made of steel refractory.
  • Figure 1 is a top view of the support plate from the bottom of a fluidized bed hearth.
  • Figure 2 is a top view of the sole provided a coating according to the invention.
  • Figure 3 is a vertical sectional view along III-III of figure 1.
  • Figure 4 is a vertical sectional view along IV-IV of figure 1.
  • Figure 5 is a vertical sectional view of the sole provided with the coating according to the invention.
  • the metal sheet is shown support 1 of the hearth hearth, in refractory metal, of preferably refractory steel such as "Incoloy 800 HT".
  • This sheet 1 is reinforced by a stiffening arrangement consisting of welded sleepers in discontinuous welding under sheet 1, for example of two continuous sleepers 2 and two perpendicular stiffeners made up of sections of sleepers 3, 3 ', 3' 'arranged in a grid with the previous. At the intersection of this grid, the sheet 1 is pierced with an orifice 4, allowing mounting sole on site as will be explained below.
  • this sheet 1 On this sheet 1 are drilled holes 5 supply lines for gas injection nozzles 10 fluidization as shown in Figures 2 and 5. These holes 5 are arranged aligned with each other according to the two directions of the support sheet 1 in a grid regular.
  • the orifices 4 of the support sheet 1 are arranged equidistant from four orifices 5 intended to the nozzles 10.
  • These elements 6 dishes are mostly square with sides substantially equal to the distance between nozzles 6, flat elements 6 rectangular being provided on the edges of the sheet 1.
  • Each flat element 6 is provided with an orifice 7 located substantially in the center of the flat element 6 and in which welding 8 is carried out, advantageously welding commonly called solder-plug consisting of a bead of weld on the edge of the orifice 7, connecting the flat element 7 to the support sheet 1.
  • solder-plug consisting of a bead of weld on the edge of the orifice 7, connecting the flat element 7 to the support sheet 1.
  • the corners of the flat elements 6 are rounded to surround the orifices 5.
  • the four 6 'flat elements are welded once the support sheet 1 is equipped with the flat elements 6 factory welded in place and injection nozzles 10 asked.
  • a round flat piece 9 is welded in the holes 4 of the support plate 1 on a tube 11 fixed to the structure carrier 12, serving to support the sheet 1 and preventing its bending.
  • the tube 11 has notches passage of the stiffening crosspieces 2, 3, 3 ', 3' '.
  • On these parts 9 are welded by a weld such as 8 in the central orifice 7 the flat elements 6 '.
  • These flat elements 6 ′ are at their more indented corners than the other flat elements 6, so that they can be inserted by passage between the heads of the nozzles 10 already installed and of larger diameter than the passage orifices 5.
  • the square flat elements 6 can have a side length of about 240 mm and the diameter of the central orifice 7 to be approximately 30 mm.
  • Such an arrangement can be used for any floor of fluidized bed hearth such as the hearth of a hearth main, the sole of an external fluidized bed associated with a main hearth or the bottom of a fluidized bed inside a main hearth as described in patent application FR-2 690,512.

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)
  • Coating By Spraying Or Casting (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP95401341A 1994-06-13 1995-06-09 Sole de foyer à lit fluidisé Expired - Lifetime EP0687856B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407184 1994-06-13
FR9407184A FR2721094B1 (fr) 1994-06-13 1994-06-13 Sole de foyer à lit fluidisé.

Publications (2)

Publication Number Publication Date
EP0687856A1 EP0687856A1 (fr) 1995-12-20
EP0687856B1 true EP0687856B1 (fr) 1998-05-20

Family

ID=9464132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401341A Expired - Lifetime EP0687856B1 (fr) 1994-06-13 1995-06-09 Sole de foyer à lit fluidisé

Country Status (10)

Country Link
US (1) US5568776A (da)
EP (1) EP0687856B1 (da)
CN (1) CN1127864A (da)
DE (1) DE69502540T2 (da)
DK (1) DK0687856T3 (da)
ES (1) ES2117366T3 (da)
FI (1) FI952851A (da)
FR (1) FR2721094B1 (da)
RU (1) RU2137070C1 (da)
ZA (1) ZA954840B (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU9201539D0 (en) * 1990-09-11 1992-08-28 Kortec Ag Method and device for gasifying gasifiable materials and/or transforming gas as well as heat exchanger of high temperature for executing said method
FR2722796B1 (fr) * 1994-07-21 1996-09-27 Produits Refractaires Piece protectrice modulaire en ceramique et grille de soufflage de regenerateur d'unite de craquage catalytique munie d'un revetement protecteur forme de telle pieces
NO975397A (no) * 1997-11-25 1998-12-14 Energos Asa Anordning ved forbrenningsovn for fast brensel
US6197265B1 (en) * 1998-01-21 2001-03-06 Iowa State University Research Foundation, Inc. Gas distribution system for a two-zone fluidized bed reactor
FI124315B (fi) * 2011-01-18 2014-06-30 Valmet Power Oy Polttokattilan arina ja polttokattila

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201203A (en) * 1922-03-29 1923-07-30 Columbia Graphophone Mfg Co Improvements in or relating to winding devices for spring motors
DE1442760B2 (de) * 1963-07-17 1977-06-02 Laporte Titanium Ltd., London Fliessbettreaktor
GB1367791A (en) * 1972-01-14 1974-09-25 Ambuco Ltd Fluidised bed equipment
GB2012030B (en) * 1977-09-21 1983-03-16 Lucas Industries Ltd Fluidised bed equipment
US4257757A (en) * 1978-06-16 1981-03-24 The Garrett Corporation Radiant combustor assembly
US4312135A (en) * 1980-01-16 1982-01-26 Devanney John W Iii Fluid bed combuster
US5161471A (en) * 1991-11-13 1992-11-10 Riley Stoker Corporation Apparatus for reburning ash material of a previously burned primary fuel

Also Published As

Publication number Publication date
ZA954840B (en) 1996-01-31
DK0687856T3 (da) 1998-10-07
FI952851A (fi) 1995-12-14
US5568776A (en) 1996-10-29
EP0687856A1 (fr) 1995-12-20
CN1127864A (zh) 1996-07-31
ES2117366T3 (es) 1998-08-01
FR2721094B1 (fr) 1996-07-19
FI952851A0 (fi) 1995-06-09
RU2137070C1 (ru) 1999-09-10
RU95109865A (ru) 1997-05-20
FR2721094A1 (fr) 1995-12-15
DE69502540T2 (de) 1998-10-08
DE69502540D1 (de) 1998-06-25

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