EP0394679A2 - Fond de four à lit fluidisé - Google Patents

Fond de four à lit fluidisé Download PDF

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Publication number
EP0394679A2
EP0394679A2 EP90105642A EP90105642A EP0394679A2 EP 0394679 A2 EP0394679 A2 EP 0394679A2 EP 90105642 A EP90105642 A EP 90105642A EP 90105642 A EP90105642 A EP 90105642A EP 0394679 A2 EP0394679 A2 EP 0394679A2
Authority
EP
European Patent Office
Prior art keywords
furnace
jackets
recesses
gas
floor 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.)
Ceased
Application number
EP90105642A
Other languages
German (de)
English (en)
Other versions
EP0394679A3 (fr
Inventor
Michael Gross
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.)
Forder- und Anlagentechnik GmbH
Original Assignee
Forder- und Anlagentechnik GmbH
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 Forder- und Anlagentechnik GmbH filed Critical Forder- und Anlagentechnik GmbH
Publication of EP0394679A2 publication Critical patent/EP0394679A2/fr
Publication of EP0394679A3 publication Critical patent/EP0394679A3/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • F27B15/02—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B15/10—Arrangements of air or gas supply devices
    • 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 invention relates to a porous, gas-permeable base for a fluidized bed furnace, in which gas-permeable ceramic stones arranged parallel to one another and transversely to the longitudinal direction of the furnace and having a rectangular plan are applied to the base structure of the furnace.
  • the innovation is based on the task of creating a gas-permeable floor for fluidized bed furnaces that has a long service life even at high and often occurring temperature differences and thus mechanical stresses, and at the same time the possibility of a relatively quick replacement in the event of floor stone failure consist.
  • This object is achieved by narrow gas chambers supported by the furnace construction and extending transversely to the longitudinal axis of the furnace and provided with a connection for supplying gases, the upper sides of which have recesses at regular intervals, and by metal-clad porous ceramic stones each placed on a recess, in which the bottoms of the jackets each have an opening corresponding to the recesses, and in which the jackets are each closed by a cover frame which is slipped over and which surrounds the jacket with folded edge strips and has at least one opening.
  • the ceramic of the floor is not only divided in the longitudinal direction of the furnace, but also also in the transverse direction, so that the stresses that occur are reduced for this reason alone.
  • the ceramic stones are each metal-coated, so that at least external stresses are largely kept away from them and even in the event of cracks, the cohesion of the ceramic initially remains secured.
  • the individual stones can also be exchanged relatively easily if necessary and can be exchanged for prepared, also coated ones that a possibly necessary repair can be carried out relatively quickly. It has also been shown that relatively narrow joints remaining between the individual jackets have practically no influence on the function of the fluidized bed furnace, for example when regenerating used foundry sands according to DE-OS 36 36 479.
  • a cuboid gas chamber 1 is shown, the gas or a gas-air mixture are supplied via the connecting piece 2.
  • This gas chamber is essentially cuboid and is inserted transversely to the longitudinal direction of the furnace in its bottom. In order to populate the entire floor, a number of such gas chambers are arranged one behind the other in the longitudinal direction of the furnace.
  • the version made of sheet steel, for example, allows a sufficiently stable construction with an even tolerable weight.
  • the upper wall of the gas chamber is, as shown in Fig. 1, provided in regular division with recesses 3, which are expediently square. These recesses are each provided in a metallic shell 4 porous Ceramic stones 5 put. In order to achieve a sufficient seal, the edge areas of the recesses 3 are expediently provided with heat-resistant seals, for example made of asbestos or the like, which are then loaded and sealed by the weight of the ceramic stones 5.
  • the jackets 4 each have openings 6 which coincide with the recesses 3, so that there is a continuous opening between the gas chamber and the respective porous ceramic stone 5.
  • the ceramic stones 5 are not only closely encased, but are also held in a form-fitting manner within the cladding 4, for example by tabs or pins 7 projecting inwards from the cladding. From above, the stones are protected by cover frames 8, which encompass upper regions of the jackets 4 with folded edge strips, and whose base surfaces are equipped with openings 9, so that gas-air mixtures supplied to the porous ceramic stones 5 from the gas chamber 1 Gas chamber can enter the ceramic stone and through this in the stove space of the furnace.
  • the ceramic stones 5 are set up so densely or set up in such a narrow pitch that only a small distance 10 remains between the folded edge strips of their cover frames 8, and a somewhat larger distance between the jackets. This can be seen in FIGS. 1 and 2 in the transverse direction of the furnace. In the longitudinal direction of the furnace, the transverse gas chambers are arranged so tightly that there are only correspondingly small distances in the longitudinal direction between the cover frame 8 of ceramic stones 5 or their jackets 4.
  • the task presupposed by the innovation is clearly and excellently solved to protect the sensitive ceramics forming the bottom of a fluidized bed furnace against the effects of high temperature gradients, and at the same time the solution offers considerable protection against mechanical stresses, so that the service life of such gas-permeable ceramic floors for fluidized bed furnaces is considerable extended and thus the operation of the same is made much more economical than was previously possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP19900105642 1989-04-11 1990-03-24 Fond de four à lit fluidisé Ceased EP0394679A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8904520U DE8904520U1 (de) 1989-04-11 1989-04-11 Boden für Wirbelschichtöfen
DE8904520U 1989-04-11

Publications (2)

Publication Number Publication Date
EP0394679A2 true EP0394679A2 (fr) 1990-10-31
EP0394679A3 EP0394679A3 (fr) 1991-05-15

Family

ID=6838158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900105642 Ceased EP0394679A3 (fr) 1989-04-11 1990-03-24 Fond de four à lit fluidisé

Country Status (2)

Country Link
EP (1) EP0394679A3 (fr)
DE (1) DE8904520U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100504165C (zh) * 2004-05-21 2009-06-24 中国科学院工程热物理研究所 镶嵌多孔段型风帽

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1537099A (fr) * 1966-07-14 1968-08-23 Kockums Mekaniska Verkstads Ab Procédé et appareil pour activer la fluidisation des matières particulaires, granulaires, ou visqueuses
FR2198873A1 (en) * 1972-09-08 1974-04-05 Siraga Hopper with fluidising base - for flour silos, ensures a practically uniform flow is obtd
EP0013975A1 (fr) * 1979-01-25 1980-08-06 COMPAGNIE EUROPEENNE POUR L'EQUIPEMENT MENAGER "CEPEM" Société anonyme dite: Installation de fluidisation
DE3407441A1 (de) * 1983-03-01 1984-09-06 Kawasaki Jukogyo K.K., Kobe, Hyogo Wirbelschicht-verbrennungsofen
FR2616684A1 (fr) * 1987-06-19 1988-12-23 Colmant Cuvelier Procede de realisation d'une bordure etanche pour support de fluidisation, et support de fluidisation a bordure etanche obtenu par ce procede

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1537099A (fr) * 1966-07-14 1968-08-23 Kockums Mekaniska Verkstads Ab Procédé et appareil pour activer la fluidisation des matières particulaires, granulaires, ou visqueuses
FR2198873A1 (en) * 1972-09-08 1974-04-05 Siraga Hopper with fluidising base - for flour silos, ensures a practically uniform flow is obtd
EP0013975A1 (fr) * 1979-01-25 1980-08-06 COMPAGNIE EUROPEENNE POUR L'EQUIPEMENT MENAGER "CEPEM" Société anonyme dite: Installation de fluidisation
DE3407441A1 (de) * 1983-03-01 1984-09-06 Kawasaki Jukogyo K.K., Kobe, Hyogo Wirbelschicht-verbrennungsofen
FR2616684A1 (fr) * 1987-06-19 1988-12-23 Colmant Cuvelier Procede de realisation d'une bordure etanche pour support de fluidisation, et support de fluidisation a bordure etanche obtenu par ce procede

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100504165C (zh) * 2004-05-21 2009-06-24 中国科学院工程热物理研究所 镶嵌多孔段型风帽

Also Published As

Publication number Publication date
EP0394679A3 (fr) 1991-05-15
DE8904520U1 (de) 1989-06-01

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