EP0687856A1 - Hearth of a fluidized bed furnace - Google Patents

Hearth of a fluidized bed furnace Download PDF

Info

Publication number
EP0687856A1
EP0687856A1 EP95401341A EP95401341A EP0687856A1 EP 0687856 A1 EP0687856 A1 EP 0687856A1 EP 95401341 A EP95401341 A EP 95401341A EP 95401341 A EP95401341 A EP 95401341A EP 0687856 A1 EP0687856 A1 EP 0687856A1
Authority
EP
European Patent Office
Prior art keywords
support sheet
hearth
flat
flat elements
sole according
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.)
Granted
Application number
EP95401341A
Other languages
German (de)
French (fr)
Other versions
EP0687856B1 (en
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/en
Application granted granted Critical
Publication of EP0687856B1 publication Critical patent/EP0687856B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 with a fluidized bed.
  • It relates more precisely to a hearth of a fluidized bed hearth comprising a metal sheet support through which nozzles for injecting fluidizing gas pass and provided with a coating of refractory material.
  • the fluidized solids strongly stress the coating by erosion taking into account their high speed transmitted by the ejection of the fluidizing gas.
  • this area of the hearth is subjected to great thermal stresses.
  • Such a layer must be very thick, greater than 100 mm. This thickness affects the total height of the hearth and the length of the supply arrangements for the fluidization nozzles.
  • the concentration of solids is indeed very high in the order of 500 to 1200 kg / m3.
  • the wear also leads to the detachment of rubble from this layer, which mixes with the fluidized combustion solids and disturbs the fluidization.
  • the support sheet is made of refractory metal and the covering consists of a plurality of flat refractory metal elements covering said support sheet, each flat element being fixed to the support sheet by welding in a localized zone that is substantially punctual.
  • the coating thus produced protects the support sheet capable of resisting heat against erosion and thermal shock. Welding in only a localized zone that is substantially punctual allows the flat elements to deform freely with regard to differential expansions. Thus they are not stressed by efforts which may tend to deteriorate them.
  • the flat elements are arranged adjacent to each other.
  • each flat element is provided with an orifice in which the welding is carried out connecting it to the support sheet.
  • the orifice is located substantially in the center of the flat element.
  • the flat elements can be substantially rectangular.
  • the nozzles can be arranged aligned with each other in the two directions of the support sheet and located at the rounded corners of the flat elements.
  • the support sheet and the flat elements are preferably made of refractory steel.
  • Figure 1 is a top view of the support plate of the bottom of a fluidized bed hearth.
  • Figure 2 is a top view of the sole provided with a coating according to the invention.
  • FIG. 3 is a view in vertical section along III-III of FIG. 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.
  • FIG. 1 there is shown the metal sheet support 1 of the hearth hearth, in refractory metal, preferably in refractory steel such as "Incoloy 800 HT".
  • This sheet 1 is reinforced by a stiffening arrangement consisting of cross-pieces welded in discontinuous weld under the sheet 1, for example of two continuous cross-pieces 2 and of two perpendicular stiffeners consisting of sections of cross-sections 3, 3 ′, 3 ′′ arranged in a grid pattern. with the previous ones. At the intersection of this grid, the sheet 1 is pierced with an orifice 4, allowing the mounting of the hearth on site as will be specified below.
  • this sheet 1 On this sheet 1 are pierced orifices 5 for passage of the supply conduits for nozzles 10 for injecting fluidization gas as visible in FIGS. 2 and 5. These orifices 5 are arranged aligned with one another in the two directions of the support sheet 1 in a regular grid.
  • the orifices 4 of the support sheet 1 are arranged equidistant from four orifices 5 intended for the nozzles 10.
  • a plurality of flat elements 6 of refractory metal preferably of refractory steel such as "Incoloy 800 HT" with a thickness of 15 mm, are arranged adjacent to each other and cover the support sheet 1, each flat element 6 being fixed to the support plate by a weld in a localized zone substantially punctual.
  • These flat elements 6 are for the most part square with sides substantially equal to the distance between nozzles 6, rectangular flat elements 6 being provided on the edges of the sheet 1.
  • Each flat element 6 is provided with an orifice 7 situated substantially in the center of the flat element 6 and in which the weld 8 is produced, advantageously a weld commonly called weld-plug consisting of a weld bead on the edge of the orifice 7, connecting the flat element 7 to the support plate 1.
  • weld-plug consisting of a weld bead on the edge of the orifice 7, connecting the flat element 7 to the support plate 1.
  • the corners of the flat elements 6 are rounded so as to surround the orifices 5.
  • the four flat elements 6 ' are welded once the support plate 1 equipped with the flat elements 6 welded in the factory put in place and the injection nozzles 10 installed.
  • a round flat piece 9 is welded in the orifices 4 of the support sheet 1 on a tube 11 fixed to the support structure 12, serving to support the sheet 1 and preventing its bending.
  • the tube 11 has notches for the passage of the stiffening crosspieces 2, 3, 3 ', 3' '.
  • On these parts 9 are welded by a weld such that 8 in the central orifice 7 the flat elements 6 '.
  • These flat elements 6 ′ are at their corners more indented than the other flat elements 6, in order to be able to be inserted by passage between the heads of the nozzles 10 already laid and of larger diameter than the passage orifices 5.
  • the square flat elements 6 may have a side of length approximately 240 mm and the diameter of the central orifice 7 may be approximately 30 mm.
  • Such an arrangement can be used for any hearth of a fluidized bed hearth such as the hearth of a main hearth, the hearth of an external fluidized bed associated with a main hearth or the hearth of a fluidized bed inside of a main hearth as described in patent application FR-2 690 512 filed on April 27, 1992 by the Applicant.

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)

Abstract

La présente invention se rapporte à une sole de foyer de lit fluidisé comprenant une tôle métallique support (1) traversée par des buses (10) d'injection de gaz de fluidisation et pourvue d'un revêtement en matériau réfractaire. La tôle support (1) est en métal réfractaire et le revêtement est constitué d'une pluralité l'éléments plats (6, 6') en métal réfractaire recouvrant ladite tôle support (1), chaque élément plat (6, 6') étant fixé à la tôle support (1) par une soudure (8) en une zone localisée sensiblement ponctuelle.The present invention relates to a hearth hearth for a fluidized bed comprising a support metal sheet (1) through which nozzles (10) for injecting fluidization gas and provided with a coating of refractory material. The support sheet (1) is made of refractory metal and the coating consists of a plurality of flat elements (6, 6 ') of refractory metal covering said support sheet (1), each flat element (6, 6') being fixed to the support sheet (1) by a weld (8) in a localized area that is substantially point.

Description

La présente invention se rapporte à une sole de foyer à lit fluidisé.The present invention relates to a hearth with a fluidized bed.

Elle concerne plus précisément une sole de foyer de lit fluidisé comprenant une tôle métallique support traversée par des buses d'injection de gaz de fluidisation et pourvue d'un revêtement en matériau réfractaire.It relates more precisely to a hearth of a fluidized bed hearth comprising a metal sheet support through which nozzles for injecting fluidizing gas pass and provided with a coating of refractory material.

Dans cette zone de foyer, les solides fluidisés sollicitent fortement le revêtement par érosion compte tenu de leur vitesse importante transmise par l'éjection du gaz de fluidisation. De plus à cause des écarts de température importants entre l'intérieur du foyer et le gaz de fluidisation à la sortie des buses d'injection de ce gaz, cette zone du foyer est soumise à de grandes sollicitations thermiques.In this hearth zone, the fluidized solids strongly stress the coating by erosion taking into account their high speed transmitted by the ejection of the fluidizing gas. In addition, because of the large temperature differences between the interior of the hearth and the fluidizing gas at the outlet of the gas injection nozzles, this area of the hearth is subjected to great thermal stresses.

Il est connu de protéger la tôle support par une couche de matériau réfractaire de type béton réfractaire.It is known to protect the support sheet with a layer of refractory material of the refractory concrete type.

Une telle couche doit être de forte épaisseur, supérieure à 100 mm. Cette épaisseur se répercute sur la hauteur totale du foyer et sur la longueur des agencements d'alimentation des buses de fluidisation.Such a layer must be very thick, greater than 100 mm. This thickness affects the total height of the hearth and the length of the supply arrangements for the fluidization nozzles.

Elle subit d'autre part une usure et une dégradation permanente qui nécessite des interventions périodiques de réfection. Au niveau de la sole, la concentration de solides est en effet très importante de l'ordre de 500 à 1200 kg/m³.On the other hand, it undergoes wear and permanent degradation which requires periodic repairs. At the level of the sole, the concentration of solids is indeed very high in the order of 500 to 1200 kg / m³.

L'usure entraîne de plus le détachement de gravats de cette couche qui viennent se mêler aux solides fluidisés de combustion et perturbent la fluidisation.The wear also leads to the detachment of rubble from this layer, which mixes with the fluidized combustion solids and disturbs the fluidization.

La présente invention résout ces problèmes et pour ce faire, selon l'invention, la tôle support est en métal réfractaire et le revêtement est constitué d'une pluralité d'éléments plats en métal réfractaire recouvrant ladite tôle support, chaque élément plat étant fixé à la tôle support par une soudure en une zone localisée sensiblement ponctuelle.The present invention solves these problems and to do this, according to the invention, the support sheet is made of refractory metal and the covering consists of a plurality of flat refractory metal elements covering said support sheet, each flat element being fixed to the support sheet by welding in a localized zone that is substantially punctual.

Le revêtement ainsi réalisé protège la tôle support capable de résister à la chaleur contre l'érosion et les chocs thermiques. La soudure en seulement une zone localisée sensiblement ponctuelle permet aux éléments plats de se déformer librement en ce qui concerne les dilatations différentielles. Ainsi ils ne sont pas sollicités par des efforts pouvant tendre à les détériorer.The coating thus produced protects the support sheet capable of resisting heat against erosion and thermal shock. Welding in only a localized zone that is substantially punctual allows the flat elements to deform freely with regard to differential expansions. Thus they are not stressed by efforts which may tend to deteriorate them.

De préférence, les éléments plats sont disposés adjacents les uns aux autres.Preferably, the flat elements are arranged adjacent to each other.

Selon un mode de réalisation préféré, chaque élément plat est pourvu d'un orifice dans lequel est réalisée la soudure le reliant à la tôle support.According to a preferred embodiment, each flat element is provided with an orifice in which the welding is carried out connecting it to the support sheet.

Avantageusement l'orifice est situé sensiblement au centre de l'élément plat.Advantageously, the orifice is located substantially in the center of the flat element.

Les éléments plats peuvent être sensiblement rectangulaires. Les buses peuvent être disposés alignées les unes aux autres selon les deux directions de la tôle support et situées aux coins arrondis des éléments plats. La tôle support et les éléments plats sont, de préférence, en acier réfractaire.The flat elements can be substantially rectangular. The nozzles can be arranged aligned with each other in the two directions of the support sheet and located at the rounded corners of the flat elements. The support sheet and the flat elements are preferably made of refractory steel.

La présente invention est décrite ci-après plus en détail à l'aide de figures ne représentant qu'un mode de réalisation préféré de l'invention.The present invention is described below in more detail using figures representing only a preferred embodiment of the invention.

La figure 1 est une vue de dessus de la tôle support de la sole d'un foyer de lit fluidisé.Figure 1 is a top view of the support plate of the bottom of a fluidized bed hearth.

La figure 2 est une vue de dessus de la sole pourvue d'un revêtement conforme à l'invention.Figure 2 is a top view of the sole provided with a coating according to the invention.

La figure 3 est une vue en coupe verticale selon III- III de la figure 1.FIG. 3 is a view in vertical section along III-III of FIG. 1.

La figure 4 est une vue en coupe verticale selon IV-IV de la figure 1.Figure 4 is a vertical sectional view along IV-IV of Figure 1.

La figure 5 est une vue en coupe verticale de la sole pourvue du revêtement conforme à l'invention.Figure 5 is a vertical sectional view of the sole provided with the coating according to the invention.

Sur la figure 1, est représentée la tôle métallique support 1 de la sole du foyer, en métal réfractaire, de préférence en acier réfractaire tel que du "Incoloy 800 HT". Cette tôle 1 est renforcée par un agencement de raidissage constituée de traverses soudées en soudure discontinue sous la tôle 1, par exemple de deux traverses 2 continues et de deux raidisseurs perpendiculaires constitués de tronçons de traverses 3, 3', 3'' disposés en quadrillage avec les précédentes. Au droit des intersections de ce quadrillage, la tôle 1 est percée d'un orifice 4, permettant le montage de la sole sur chantier comme il sera précisé plus loin.In Figure 1, there is shown the metal sheet support 1 of the hearth hearth, in refractory metal, preferably in refractory steel such as "Incoloy 800 HT". This sheet 1 is reinforced by a stiffening arrangement consisting of cross-pieces welded in discontinuous weld under the sheet 1, for example of two continuous cross-pieces 2 and of two perpendicular stiffeners consisting of sections of cross-sections 3, 3 ′, 3 ″ arranged in a grid pattern. with the previous ones. At the intersection of this grid, the sheet 1 is pierced with an orifice 4, allowing the mounting of the hearth on site as will be specified below.

Sur cette tôle 1 sont percés des orifices 5 de passage des conduits d'alimentation des buses 10 d'injection de gaz de fluidisation comme visible sur les figures 2 et 5. Ces orifices 5 sont disposés alignés les uns aux autres selon les deux directions de la tôle support 1 en un quadrillage régulier. Avantageusement, les orifices 4 de la tôle support 1 sont disposés équidistants de quatre orifices 5 destinés aux buses 10.On this sheet 1 are pierced orifices 5 for passage of the supply conduits for nozzles 10 for injecting fluidization gas as visible in FIGS. 2 and 5. These orifices 5 are arranged aligned with one another in the two directions of the support sheet 1 in a regular grid. Advantageously, the orifices 4 of the support sheet 1 are arranged equidistant from four orifices 5 intended for the nozzles 10.

Une pluralité d'éléments plats 6 en métal réfractaire, de préférence en acier réfractaire tel que du "Incoloy 800 HT" d'une épaisseur de 15 mm, sont disposés adjacents les uns aux autres et recouvrent la tôle support 1, chaque élément plat 6 étant fixé à la tôle support par une soudure en une zone localisée sensiblement ponctuelle. Ces éléments plats 6 sont pour la plupart carrés de côtés sensiblement égaux à la distance entre buses 6, des éléments plats 6 rectangulaires étant prévus sur les bords de la tôle 1.A plurality of flat elements 6 of refractory metal, preferably of refractory steel such as "Incoloy 800 HT" with a thickness of 15 mm, are arranged adjacent to each other and cover the support sheet 1, each flat element 6 being fixed to the support plate by a weld in a localized zone substantially punctual. These flat elements 6 are for the most part square with sides substantially equal to the distance between nozzles 6, rectangular flat elements 6 being provided on the edges of the sheet 1.

Chaque élément plat 6 est pourvu d'un orifice 7 situé sensiblement au centre de l'élément plat 6 et dans lequel est réalisée la soudure 8, avantageusement une soudure couramment appelée soudure-bouchon constituée d'un cordon de soudure sur le bord de l'orifice 7, reliant l'élément plat 7 à la tôle support 1. Les coins des éléments plats 6 sont arrondis pour venir entourer les orifices 5.Each flat element 6 is provided with an orifice 7 situated substantially in the center of the flat element 6 and in which the weld 8 is produced, advantageously a weld commonly called weld-plug consisting of a weld bead on the edge of the orifice 7, connecting the flat element 7 to the support plate 1. The corners of the flat elements 6 are rounded so as to surround the orifices 5.

Ces éléments plats 6 sont soudés tel que représenté sur la figure 3 en usine sauf les quatre éléments 6' destinés à être disposés aux emplacements des orifices 4 de la tôle support 1 et qui sont soudés sur chantier comme visible sur la figure 4.These flat elements 6 are welded as shown in Figure 3 at the factory except the four elements 6 'intended to be arranged at the locations of the orifices 4 of the support sheet 1 and which are welded on site as visible in FIG. 4.

Sur chantier, sont soudés les quatre éléments plats 6' une fois la tôle support 1 équipée des éléments plats 6 soudés en usine mise en place et les buses d'injection 10 posées. Une pièce plate ronde 9 est soudés dans les orifices 4 de la tôle support 1 sur un tube 11 fixé à la structure porteuse 12, servant au support de la tôle 1 et empêchant sa flexion. Pour ce faire, le tube 11 présente des échancrures de passage des traverses de raidissage 2, 3, 3', 3''. Sur ces pièces 9 sont soudés par une soudure telle que 8 dans l'orifice 7 central les éléments plats 6'.On site, the four flat elements 6 'are welded once the support plate 1 equipped with the flat elements 6 welded in the factory put in place and the injection nozzles 10 installed. A round flat piece 9 is welded in the orifices 4 of the support sheet 1 on a tube 11 fixed to the support structure 12, serving to support the sheet 1 and preventing its bending. To do this, the tube 11 has notches for the passage of the stiffening crosspieces 2, 3, 3 ', 3' '. On these parts 9 are welded by a weld such that 8 in the central orifice 7 the flat elements 6 '.

Ces éléments plats 6' sont à leur coins plus échancrés que les autres éléments plats 6, afin de pouvoir être insérés par passage entre les têtes des buses 10 déjà posées et de diamètre plus grand que les orifices de passage 5.These flat elements 6 ′ are at their corners more indented than the other flat elements 6, in order to be able to be inserted by passage between the heads of the nozzles 10 already laid and of larger diameter than the passage orifices 5.

A titre d'exemples, les éléments plats carrés 6 peuvent avoir un côté de longueur environ 240 mm et le diamètre de l'orifice central 7 être d'environ 30 mm.By way of example, the square flat elements 6 may have a side of length approximately 240 mm and the diameter of the central orifice 7 may be approximately 30 mm.

Un tel agencement peut être utilisé pour toute sole de foyer de lit fluidisé telle que la sole d'un foyer principal, la sole d'un lit fluidisé extérieur associé à un foyer principal ou la sole d'un lit fluidisé intérieur à un foyer principal comme décrit dans la demande de brevet FR-2 690 512 déposée le 27 avril 1992 par la Déposante.Such an arrangement can be used for any hearth of a fluidized bed hearth such as the hearth of a main hearth, the hearth of an external fluidized bed associated with a main hearth or the hearth of a fluidized bed inside of a main hearth as described in patent application FR-2 690 512 filed on April 27, 1992 by the Applicant.

Claims (7)

1) Sole de foyer de lit fluidisé comprenant une tôle métallique support (1) traversée par des buses (10) d'injection de gaz de fluidisation et pourvue d'un revêtement en matériau réfractaire, caractérisé en ce que la tôle support (1) est en métal réfractaire et en ce que le revêtement est constitué d'une pluralité d'éléments plats (6, 6') en métal réfractaire recouvrant ladite tôle support (1), chaque élément plat (6, 6') étant fixé à la tôle support (1) par une soudure (8) en une zone localisée sensiblement ponctuelle. 1) Fluidized bed hearth hearth comprising a metal support sheet (1) through which nozzles (10) for injecting fluidizing gas pass and provided with a coating of refractory material, characterized in that the support sheet (1) is made of refractory metal and in that the covering consists of a plurality of flat elements (6, 6 ') of refractory metal covering said support sheet (1), each flat element (6, 6') being fixed to the support sheet (1) by a weld (8) in a localized zone that is substantially punctual. 2) Sole selon la revendication 1, caractérisée en ce que les éléments plats (6, 6') sont disposés adjacents les uns aux autres. 2) Sole according to claim 1, characterized in that the flat elements (6, 6 ') are arranged adjacent to each other. 3) Sole selon la revendication 1 ou 2, caractérisée en ce que chaque élément plat (6, 6') est pourvu d'un orifice (7) dans lequel est réalisée la soudure (8) le reliant à la tôle support (1). 3) Sole according to claim 1 or 2, characterized in that each flat element (6, 6 ') is provided with an orifice (7) in which the welding (8) is carried out connecting it to the support sheet (1) . 4) Sole selon la revendication 3, caractérisée en ce que l'orifice (7) est situé sensiblement au centre de l'élément plat (6, 6'). 4) Sole according to claim 3, characterized in that the orifice (7) is located substantially in the center of the flat element (6, 6 '). 5) Sole selon l'une des revendications précédentes, caractérisée en ce que les éléments plats (6, 6') sont sensiblement rectangulaires. 5) Sole according to one of the preceding claims, characterized in that the flat elements (6, 6 ') are substantially rectangular. 6) Sole selon la revendication 5, caractérisée en ce que les buses (10) sont disposés alignées les unes aux autres selon les deux directions de la tôle support (1) et situées aux coins arrondis des éléments plats (6, 6'). 6) Sole according to claim 5, characterized in that the nozzles (10) are arranged aligned with each other in the two directions of the support sheet (1) and located at the rounded corners of the flat elements (6, 6 '). 7) Sole selon l'une des revendications précédentes, caractérisée en ce que la tôle support (1) et les éléments plats (6, 6') sont en acier réfractaire. 7) Sole according to one of the preceding claims, characterized in that the support sheet (1) and the flat elements (6, 6 ') are made of refractory steel.
EP95401341A 1994-06-13 1995-06-09 Hearth of a fluidized bed furnace Expired - Lifetime EP0687856B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407184A FR2721094B1 (en) 1994-06-13 1994-06-13 Fluid bed hearth hearth.
FR9407184 1994-06-13

Publications (2)

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

Family

ID=9464132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401341A Expired - Lifetime EP0687856B1 (en) 1994-06-13 1995-06-09 Hearth of a fluidized bed furnace

Country Status (10)

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

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 (en) * 1994-07-21 1996-09-27 Produits Refractaires MODULAR PROTECTIVE PIECE IN CERAMIC AND BLOW GRILLE OF REGENERATOR OF CATALYTIC CRACKING UNIT PROVIDED WITH A PROTECTIVE COATING FORMED IN SUCH PARTS
NO304450B1 (en) * 1997-11-25 1998-12-14 Energos Asa Solid fuel incinerator
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 (en) * 2011-01-18 2014-06-30 Valmet Power Oy Burning grate and burner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1367791A (en) * 1972-01-14 1974-09-25 Ambuco Ltd Fluidised bed equipment
DE1442760B2 (en) * 1963-07-17 1977-06-02 Laporte Titanium Ltd., London FLUID BED REACTOR
GB2012030A (en) * 1977-09-21 1979-07-18 Lucas Industries Ltd Fluidised bed equipment
US5161471A (en) * 1991-11-13 1992-11-10 Riley Stoker Corporation Apparatus for reburning ash material of a previously burned primary fuel

Family Cites Families (3)

* 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
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1442760B2 (en) * 1963-07-17 1977-06-02 Laporte Titanium Ltd., London FLUID BED REACTOR
GB1367791A (en) * 1972-01-14 1974-09-25 Ambuco Ltd Fluidised bed equipment
GB2012030A (en) * 1977-09-21 1979-07-18 Lucas Industries Ltd Fluidised bed equipment
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
DE69502540D1 (en) 1998-06-25
CN1127864A (en) 1996-07-31
ZA954840B (en) 1996-01-31
DE69502540T2 (en) 1998-10-08
EP0687856B1 (en) 1998-05-20
RU95109865A (en) 1997-05-20
FR2721094A1 (en) 1995-12-15
ES2117366T3 (en) 1998-08-01
DK0687856T3 (en) 1998-10-07
FI952851A0 (en) 1995-06-09
FI952851A (en) 1995-12-14
RU2137070C1 (en) 1999-09-10
FR2721094B1 (en) 1996-07-19
US5568776A (en) 1996-10-29

Similar Documents

Publication Publication Date Title
EP1756367B1 (en) Lightweight metal joint for concrete surfaces
EP0295175B2 (en) Hollow structure with flat base plate
EP0202256B2 (en) Method of construction for a covered structure
EP0687856A1 (en) Hearth of a fluidized bed furnace
EP0144040B1 (en) Device for holding together adjacent vertical tube sections of a loop-type heat exchanger
WO2007132072A1 (en) Modular vibratory floor
EP0166989B1 (en) Vertical tube heat exchange panel for recovery boilers, such as black liquor boilers or town refuse incinerators, and manufacturing processes
EP0090708A1 (en) Supporting spacer for floor boards
FR2661235A1 (en) Beam forming an expansion joint between two layers of hearth grates joined together side by side, with alternately fixed and movable rods
WO1990003469A1 (en) Device for connecting two road section separated by an expansion joint
EP3760078B1 (en) Storage device including shelf
EP0048645B1 (en) Electric heating furnace with low thermal inertia
EP0022726B1 (en) Fluidisation grid
EP3767057B1 (en) Equipment for forming an overhead car park including timber deck modules
EP0065920B1 (en) Treatment-column, especially for absorption and distillation
WO2024089054A1 (en) Glass furnace
FR2683575A1 (en) SLAB FORMWORK PANEL.
EP0146940B1 (en) Temperature gradients subjected metallic flue for a boiler
FR3141162A1 (en) glass furnace and smoke evacuation
FR2568993A1 (en) Device for firmly fixing adjacent extreme lengths of a panel of horizontal tubes
FR2458775A1 (en) Industrial kiln pipe cladding - is secured by radial holders with ends extending in axial direction
EP4252257A1 (en) Floating maintenance platform for a nuclear facility
FR2653458A1 (en) Panels to be fixed on the guard rails of upper passages, intended especially for the protection against throwing of projectiles, and their fastening means
CA2044112C (en) Expansion joint beam between two laminated fireplace grids with alternate mobile and stationary bars
FR3114334A1 (en) Formwork device and modular formwork structure

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE DK ES GB

17P Request for examination filed

Effective date: 19960514

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19971023

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE DK ES GB

REF Corresponds to:

Ref document number: 69502540

Country of ref document: DE

Date of ref document: 19980625

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2117366

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980713

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010515

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20010531

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010611

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20010614

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010621

Year of fee payment: 7

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020609

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020610

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020731

BERE Be: lapsed

Owner name: *GEC ALSTHOM STEIN INDUSTRIE

Effective date: 20020630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020609

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030711