EP0394679A2 - Floor for a fluidized bed furnace - Google Patents

Floor for a fluidized bed furnace 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
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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
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German (de)
French (fr)
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EP0394679A3 (en
Inventor
Michael Gross
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Forder- und Anlagentechnik GmbH
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Forder- und Anlagentechnik GmbH
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Publication of EP0394679A2 publication Critical patent/EP0394679A2/en
Publication of EP0394679A3 publication Critical patent/EP0394679A3/en
Ceased legal-status Critical Current

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    • 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)
  • Combustion & Propulsion (AREA)
  • Dispersion Chemistry (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

Floors for fluidized bed furnaces, which floors are made of porous ceramic blocks permeable to gas, have only a very short service life in the face of the greatly varying temperatures of the gases flowing through them. In order to increase the service life considerably, narrow, closed gas chambers are provided which are supported by the furnace structure, extend transversely to the longitudinal axis of the furnace and are provided with a connection for supplying gases. The top side of the gas chambers has recesses at a regular spacing and is also covered by porous ceramic blocks encased in metal and placed in each case onto a recess, in which ceramic blocks the bases of the casings each have an opening corresponding to and communicating with the recesses, and in which ceramic blocks the casing is closed on a slipped-over cover frame surrounding the casing with folded edge strips and having at least one opening. <IMAGE>

Description

Die Erfindung betrifft einen porösen, gasdurchlässigen Boden für einen Wirbelschichtofen, bei dem parallel nebeneinander und quer zur Längsrichtung des Ofens angeordnete, einen rechteckigen Grundriß aufweisende gasdurchlässige Keramik­steine auf die Bodenkonstruktion des Ofens aufgebracht sind.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.

Es hat sich jedoch gezeigt, daß üblicherweise solche Böden, insbesondere wenn sie mit höheren Temperaturen beansprucht werden, eine nur geringe Standzeit aufweisen. Insbesondere hat sich bemerkbar gemacht, daß bei der Inbetriebnahme eines solchen Wirbelschichtofens, auch als Fließbettofen bezeich­net, die Bodensteine, ausgehend von der üblichen Außentempe­ratur, auf Temperaturen von 5 bis 700oC aufzuheizen sind. Im Interesse der Erzielung sowohl hoher Temperaturen als auch eines hohen Wirkungsgrades wird nämlich die den Bodensteinen zugeführte Luft bzw. das Gas-Luft-Gemisch durch Wärmeaustau­scher auf Temperaturen bis bspw. 600o aufgeheizt. Das be­deutet, daß während der gesamten Anheizphase die ursprüng­lich mit der Außentemperatur zugeführte Luft zwar relativ langsam, aber stetig aufgeheizt wird, so daß zu Beginn der Aufheizphase noch Luft mit der Außentemperatur zur Verfügung steht, während gegen Ende der Aufheizphase die Luft zwi­schenzeitlich mit Temperaturen von über 600o die Keramik­steine durchsetzt. Diese hohe Differenz zwischen Ausgangs-und Betriebstemperatur bedingt erhebliche Span­nungen innerhalb des spröden Keramikgefüges, die zu Sprün­gen, Rissen und dergleichen führen und die Keramiksteine vorzeitig zerstören.However, it has been shown that such floors usually have only a short service life, especially when they are subjected to higher temperatures. In particular, it has become noticeable that when starting up such a fluidized bed furnace, also referred to as a fluidized bed furnace, the base stones are to be heated to temperatures of 5 to 700 ° C., starting from the usual outside temperature. In the interest of achieving both high temperatures and high efficiency, the air supplied to the floor stones or the gas-air mixture is heated to temperatures up to, for example, 600 ° C. by heat exchangers. This means that during the entire heating-up phase, the air originally supplied with the outside temperature is heated up relatively slowly but steadily, so that air with the outside temperature is still available at the beginning of the heating-up phase, while towards the end of the heating-up phase the air is temporarily at temperatures of over 600 o penetrated the ceramic stones. This high difference between The initial and operating temperature cause considerable tensions within the brittle ceramic structure, which lead to cracks, cracks and the like and destroy the ceramic stones prematurely.

Die Neuerung geht von der Aufgabe aus, einen gasdurchlässi­gen Boden für Wirbelschichtöfen zu schaffen, der auch bei hohen und oft auftretenden Temperaturdifferenzen und damit mechanischen Spannungen eine lange Standzeit aufweist, und gleichzeitig soll für den Fall des Ausfalls von Bodensteinen die Möglichkeit eines relativ schnell durchzuführenden Er­satzes bestehen.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.

Gelöst wird diese Aufgabe durch von der Ofenkonstruktion getragene schmale, sich quer zur Längsachse des Ofens er­streckende geschlossene, mit einem Anschluß zur Zuführung von Gasen vorgesehene Gaskammern, deren Oberseiten in regel­mäßiger Teilung Ausnehmungen aufweisen, sowie durch jeweils auf eine Ausnehmung gestellte, metallummantelte poröse Kera­miksteine, bei denen die Böden der Mäntel je eine den Aus­nehmungen entsprechende Öffnung aufweisen, und bei dem die Mäntel durch jeweils einen übergestülpten, den Mantel mit abgekanteten Randstreifen umgreifenden und mindestens eine Öffnung aufweisenden Deckrahmen geschlossen ist. Hierbei ist die Keramik des Bodens nicht nur in Längsrichtung des Ofens, sondern zusätzlich auch noch in Querrichtung unterteilt, so daß bereits aus diesem Grunde die auftretenden Spannungen abgebaut sind. Des weiteren aber sind die Keramiksteine jeweils metallummantelt, so daß zumindest äußere Beanspru­chungen von ihnen weitgehend ferngehalten werden und selbst im Falle des Auftretens von Sprüngen ein Zusammenhalt der Keramik zunächst gesichert bleibt. Die einzelnen Steine lassen sich auch im Bedarfsfalle relativ leicht auswechseln und gegen vorbereitete, ebenfalls ummantelte austauschen, so daß eine eventuell erforderlich werdende Reparatur sich relativ schnell durchführen läßt. Es hat sich weiterhin gezeigt, daß zwischen den einzelnen Mänteln verbleibende, relativ schmale Fugen auf die Funktion des Wirbelschicht­ofens praktisch ohne Einfluß bleiben, so bspw. beim Regene­rieren von Gießerei-Altsanden nach der DE-OS 36 36 479.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. Here, 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. In addition, however, 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.

Vorteilhafte und zweckmäßige Weiterbildungen der Neuerung sind den Unteransprüchen zu entnehmen.Advantageous and expedient further developments of the innovation can be found in the subclaims.

Im einzelnen sind die Merkmale der Neuerung anhand der Be­schreibung eines Ausführungsbeispieles in Verbindung mit dieses darstellenden Zeichnungen erläutert. Es zeigen hierbei

  • Figur 1 einen vertikalen Halbschnitt durch die neuerungs­gemäße Bodenkonstruktion, und
  • Figur 2 die Aufsicht auf die Anordnung nach Fig. 1.
The features of the innovation are explained in detail on the basis of the description of an exemplary embodiment in conjunction with the drawings which illustrate the same. It shows here
  • 1 shows a vertical half section through the floor construction according to the innovation, and
  • 2 shows the supervision of the arrangement according to FIG. 1.

In den Figuren ist eine quaderförmige Gaskammer 1 darge­stellt, der Gas bzw. ein Gas-Luft-Gemisch über den Anschluß­stutzen 2 zugeführt werden. Diese Gaskammer ist im wesent­lichen quaderförmig ausgeführt und wird quer zur Längsrich­tung des Ofens in dessen Boden eingsetzt. Um den Gesamtboden zu bestücken, sind eine Anzahl solcher Gaskammern in Längs­richtung des Ofens hintereinander angeordnet. Die Ausführung aus bspw. Stahlblech erlaubt einen ausreichend stabilen Aufbau bei noch erträglichem Gewicht.In the figures, 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.

Die obere Wandung der Gaskammer ist, wie Fig. 1 zeigt, in regelmäßiger Teilung mit Ausnehmungen 3 versehen, die zweck­mäßig quadratisch ausgeführt sind. Auf diese Ausnehmungen sind jeweils in einem metallenen Mantel 4 vorgesehene poröse Keramiksteine 5 gestellt. Um eine ausreichende Abdichtung zu erreichen, sind zweckmäßig die Randbereiche der Ausnehmungen 3 mit hitzebeständigen Dichtungen, bspw. aus Asbest oder dergleichen, versehen, die dann durch das Gewicht der Kera­miksteine 5 belastet und abgedichtet werden. Die Mäntel 4 weisen jeweils Durchbrechungen 6 auf, die mit den Ausnehmun­gen 3 koinzidieren, so daß eine durchgehende Öffnung zwi­schen der Gaskammer und dem jeweiligen porösen Keramikstein 5 besteht.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.

Um die Keramiksteine 5 eindeutig zu halten, sind diese nicht nur eng ummantelt, sondern auch noch innerhalb der Mäntel 4 formschlüssig, bspw. durch nach innen vom Mantel her auskra­gende Laschen oder Zapfen 7 gehalten. Von oben her sind die Steine durch Deckrahmen 8 geschützt, die mit abgekanteten Randstreifen obere Bereiche der Mäntel 4 umgreifen, und deren Grundflächen mit Öffnungen 9 ausgestattet sind, so daß von der Gaskammer 1 her den porösen Keramiksteinen 5 zuge­führte Gas-Luft-Gemische von der Gaskammer in den Keramik­stein und über diesen in den Herdraum des Ofens eintreten können.In order to keep the ceramic stones 5 unambiguous, they 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.

Die Keramiksteine 5 sind so dicht aufgestellt bzw. in so enger Teilung aufgestellt, daß zwischen den abgekanteten Randstreifen ihrer Deckrahmen 8 nur noch ein geringer Ab­stand 10 verbleibt, und zwischen den Mänteln ein etwas größerer Abstand. In Querrichtung des Ofens geht dies aus den Fig. 1 und 2 hervor. In Längsrichtung des Ofens sind die querstehenden Gaskammern derart dicht angeordnet, daß auch in Längsrichtung zwischen Deckrahmen 8 von Keramiksteinen 5 bzw. deren Mänteln 4 nur entsprechend geringe Abstände be­stehen.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.

Es hat sich herausgestellt, daß der übliche Betrieb dieser Öfen durch die verbleibenden geringen Abstände nicht gestört wird. Selbst bei dem Regenerieren von Gießerei-Altsand nach der DE-OS 36 36 479 treten hierbei keine Störungen auf. Andererseits sorgt die relativ feine Unterteilung des Kera­mikbodens in einzelne poröse Keramiksteine 5, daß auch beim Anfahren des Ofens, d.h. beim Erwärmen von Umgebungstempe­ratur auf bspw. 600o, keine wesentlichen Spannungen auftre­ten können, welche die Keramiksteine gefährden. Die feste Ummantelung sorgt weiterhin dafür, daß im langen Betrieb und beim oft wiederholten Anfahren doch auftretende Sprünge die Festigkeit nicht beeinträchtigen, da die Ummantelung die Keramiksteine zusammenhält und ein Zerfallen derselben prak­tisch unmöglich macht, zumal sie von von außen aufgezwunge­nen Belastungen praktisch frei sind. Sollten aber doch einer oder mehrere der Keramiksteine ersetzt werden, so ist dies relativ einfach, da diese mit ihrer Ummantelung bevorratet werden können, so daß eine solche Instandsetzung als ein­facher Austausch sich relativ schnell durchführen läßt.It has been found that the normal operation of these furnaces is not disturbed by the remaining short distances. Even when regenerating old foundry sand according to DE-OS 36 36 479, there are no disturbances. On the other hand, the relatively fine subdivision of the ceramic floor into individual porous ceramic stones 5 ensures that even when the furnace is started up, ie when the ambient temperature is raised to, for example, 600 o , no significant stresses can occur which endanger the ceramic stones. The solid sheathing also ensures that cracks that occur during long operation and often repeated starts do not impair the strength, since the sheathing holds the ceramic stones together and makes them practically impossible to disintegrate, especially since they are practically free from external loads. However, if one or more of the ceramic stones are to be replaced, this is relatively simple since they can be stored with their sheathing, so that such a repair can be carried out relatively quickly as a simple exchange.

Die der Neuerung vorausgestellte Aufgabe jedenfalls ist eindeutig und hervorragend gelöst, die den Boden eines Wir­belschichtofens bildende empfindliche Keramik gegen die Auswirkungen hoher Temperaturgradienten zu schützen, und die Lösung bietet gleichzeitig einen erheblichen Schutz gegen mechanische Beanspruchungen, so daß die Standzeit derartiger gasdurchlässiger Keramikböden für Wirbelschichtöfen erheb­lich verlängert und damit der Betrieb derselben wesentlich wirtschaftlicher gestaltet wird, als dieses bisher möglich war.In any case, 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.

Claims (5)

1. Poröser, gasdurchlässiger Boden für einen Wirbelschicht­ofen, bei dem parallel nebeneinander und quer zur Längs­richtung des Ofens angeordnete, einen rechteckigen Grund­riß aufweisende gasdurchlässige Keramiksteine auf die Bodenkonstruktion des Ofens aufgebracht sind,
gekennzeichnet durch
von der Ofenkonstruktion getragene schmale, sich quer zur Längsachse des Ofens erstreckende geschlossene, mit einem Anschluß (Anschlußstutzen 2) zur Zuführung von Gasen vorgesehene Gaskammern (1), deren Oberseite in regelmäßi­ger Teilung Ausnehmungen (3) aufweist,
sowie durch jeweils auf eine Ausnehmung gestellte, me­tallummantelte (Mantel 4) poröse Keramiksteine (5), bei denen die Böden der Mäntel (4) je eine den Ausnehmungen (3) entsprechende und mit diesen kommunizierende Öffnung (6) aufweisen,
und bei denen der Mantel (4) auf einen übergestülpten, den Mantel mit abgekanteten Randstreifen umgreifenden und mindestens eine Öffnung (9) aufweisenden Deckrahmen (8) geschlossen ist.1. 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,
marked by
narrow gas chambers (1) carried by the furnace structure and extending transversely to the longitudinal axis of the furnace and provided with a connection (connecting piece 2) for supplying gases, the top side of which has recesses (3) in regular division,
and by porous ceramic stones (5), each of which is placed on a recess and has metal-coated (jacket 4), in which the bottoms of the jackets (4) each have an opening (6) corresponding to the recesses (3) and communicating with them
and in which the jacket (4) is closed on a cover frame (8) which is slipped over and which surrounds the jacket with folded edge strips and has at least one opening (9). 2. Boden nach Anspruch 1,
dadurch gekennzeichnet,
daß die Wandungen der Mäntel (4) der porösen Keramik­steine (5) sich jeweils in geringem Abstande (10) einan­der gegenüberstehen.2. Floor according to claim 1,
characterized,
that the walls of the jackets (4) of the porous ceramic stones (5) face each other at a short distance (10). 3. Boden nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß zwischen den Randbereichen der Ausnehmungen (3) und den Grundflächen der Mäntel (4) Dichtungen vorgesehen sind.3. Floor according to claim 1 or 2,
characterized,
that seals are provided between the edge regions of the recesses (3) and the base surfaces of the jackets (4). 4. Boden nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Mäntel (4) nach innen auskragende formschlüssige Elemente (Zapfen 7) aufweisen.4. Floor according to one of claims 1 to 3,
characterized,
that the jackets (4) have inwardly projecting positive elements (pin 7). 5. Boden nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß der Sitz der Mäntel (4) auf den Deckflächen der Gas­kammern (1) durch formschlüssig ineinandergreifende Ele­mente wie Löcher und in diese eingreifende Zapfen gesi­chert ist.5. Floor according to one of claims 1 to 4,
characterized,
that the seat of the jackets (4) on the top surfaces of the gas chambers (1) is secured by form-fitting interlocking elements such as holes and pins engaging in them.
EP19900105642 1989-04-11 1990-03-24 Floor for a fluidized bed furnace Ceased EP0394679A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8904520U 1989-04-11
DE8904520U DE8904520U1 (en) 1989-04-11 1989-04-11

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EP0394679A2 true EP0394679A2 (en) 1990-10-31
EP0394679A3 EP0394679A3 (en) 1991-05-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100504165C (en) * 2004-05-21 2009-06-24 中国科学院工程热物理研究所 Blast cap with a mosaic porous section

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1537099A (en) * 1966-07-14 1968-08-23 Kockums Mekaniska Verkstads Ab Method and apparatus for promoting fluidization of particulate, granular, or viscous materials
FR2198873A1 (en) * 1972-09-08 1974-04-05 Siraga Hopper with fluidising base - for flour silos, ensures a practically uniform flow is obtd
EP0013975A1 (en) * 1979-01-25 1980-08-06 COMPAGNIE EUROPEENNE POUR L'EQUIPEMENT MENAGER "CEPEM" Société anonyme dite: Fluidisation equipment
DE3407441A1 (en) * 1983-03-01 1984-09-06 Kawasaki Jukogyo K.K., Kobe, Hyogo FLUIDIZED LAYER INCINERATOR
FR2616684A1 (en) * 1987-06-19 1988-12-23 Colmant Cuvelier Process for producing a leakproof edging for a fluidisation support, and fluidisation support with a leakproof edging obtained by this process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1537099A (en) * 1966-07-14 1968-08-23 Kockums Mekaniska Verkstads Ab Method and apparatus for promoting fluidization of particulate, granular, or viscous materials
FR2198873A1 (en) * 1972-09-08 1974-04-05 Siraga Hopper with fluidising base - for flour silos, ensures a practically uniform flow is obtd
EP0013975A1 (en) * 1979-01-25 1980-08-06 COMPAGNIE EUROPEENNE POUR L'EQUIPEMENT MENAGER "CEPEM" Société anonyme dite: Fluidisation equipment
DE3407441A1 (en) * 1983-03-01 1984-09-06 Kawasaki Jukogyo K.K., Kobe, Hyogo FLUIDIZED LAYER INCINERATOR
FR2616684A1 (en) * 1987-06-19 1988-12-23 Colmant Cuvelier Process for producing a leakproof edging for a fluidisation support, and fluidisation support with a leakproof edging obtained by this process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100504165C (en) * 2004-05-21 2009-06-24 中国科学院工程热物理研究所 Blast cap with a mosaic porous section

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DE8904520U1 (en) 1989-06-01
EP0394679A3 (en) 1991-05-15

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