EP1275924A1 - Four à feu tournant à chambres - Google Patents

Four à feu tournant à chambres Download PDF

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Publication number
EP1275924A1
EP1275924A1 EP01810937A EP01810937A EP1275924A1 EP 1275924 A1 EP1275924 A1 EP 1275924A1 EP 01810937 A EP01810937 A EP 01810937A EP 01810937 A EP01810937 A EP 01810937A EP 1275924 A1 EP1275924 A1 EP 1275924A1
Authority
EP
European Patent Office
Prior art keywords
elements
floor
wall
foundation
annular chamber
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.)
Withdrawn
Application number
EP01810937A
Other languages
German (de)
English (en)
Inventor
Peter Van Varik
Willem Venus
Peter Sommer
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.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
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 Alcan Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Priority to PCT/EP2002/006643 priority Critical patent/WO2003006905A1/fr
Publication of EP1275924A1 publication Critical patent/EP1275924A1/fr
Withdrawn legal-status Critical Current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
    • F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
    • F27B13/06—Details, accessories or equipment specially adapted for furnaces of this type
    • F27B13/08—Casings
    • 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
    • F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
    • F27B13/02—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge of multiple-chamber type with permanent partitions; Combinations of furnaces
    • 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
    • F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
    • F27B13/06—Details, accessories or equipment specially adapted for furnaces of this type
    • F27B13/08—Casings
    • F27B13/10—Arrangements of linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/141—Anchors therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/145—Assembling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means
    • F27D2007/045—Fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0005—Cooling of furnaces the cooling medium being a gas

Definitions

  • the present invention relates to an annular chamber furnace for the production of carbon-containing Shaped bodies, in particular electrodes for aluminum melt flow electrolysis, containing two parallel to each other, arranged in tub constructions Rows of combustion chambers, the tub structures having outer walls and are arranged separated from each other by a room divider, and a method for the production of such an annular chamber furnace.
  • Chamber furnaces for burning carbon blocks, particularly as anodes the electrolytic extraction of aluminum are known. They consist of several, stationary arranged in one or a plurality of rows, the are usually arranged in tub, basin or trough constructions.
  • the combustion chambers are through across the row and across the firing direction lying belt walls mutually as well as alongside one another through the outer walls the tub constructions delimited from the outside.
  • the combustion chambers are aligned along or in the firing direction running firing shafts divided into cassettes.
  • the vertical ones Cassettes hold the carbon blocks, usually in a cassette several such carbon blocks are stacked on top of one another.
  • the chambers are each open at the top or closed with a removable cover.
  • the chambers are usually heat-insulating to the outer walls and to the floor Material, for example with insulation stones, such as foam stones, burnout stones or covered with moler or calcium silicate stones.
  • insulation stones such as foam stones, burnout stones or covered with moler or calcium silicate stones.
  • the individual cassettes or the fire pit walls are made of refractory bricks, such as firebricks.
  • the so-called ring chamber furnaces are widely used. These stand out by the parallel arrangement of two arranged in tub constructions and by a room divider delimited rows of combustion chambers.
  • the fire pit systems of the two rows of combustion chambers are on the end faces of the rows of combustion chambers bridged, whereby a ring condition is achieved for the fire pit systems.
  • the bridging takes place either in such a way that all fire ducts in one collecting channel flow or be diverted in groups. A separate redirection each individual fire pit is of course also conceivable.
  • the combustion chamber rows of an annular chamber furnace are usually in parallel Tub constructions with cuboid volume.
  • the tub constructions rest on a stable foundation and have outer and end walls.
  • the two tub constructions of an annular chamber furnace can be on the inside Pages separate side walls spaced from each other or a common one Design room dividers in the form of an integral inner wall.
  • the walls as well as the The floor or the foundation of the tub constructions are usually made of concrete.
  • tub constructions contain separate, spaced inner walls this is achieved through active or passive cooling of the interior wall space cooled. If the tub constructions contain a common integral inner wall, see above has these wall cavities, for example in the form of cooling channels, for the circulation of a Cooling medium. In the case of small internal wall spaces and integral internal walls With wall cavities, active cooling is necessary for efficient heat dissipation. This takes place, for example, via an air circulation stimulated by ventilation through the interior wall spaces or wall cavities.
  • a typical tub construction for receiving a row of combustion chambers has a length of 100-200 m, especially 70-200 m, a width of around 11-13 m, in particular from 9-13 m, and a height of around 4-6 m.
  • the total width of a Annular chamber furnace measures, for example, around 25-30 m. The dimensions reflect only guidelines and no exact dimensions.
  • a dough-like mixture of one with one Binder such as tar and / or pitch-provided mass of petroleum coke, shiny coal, soot or graphite formed into blocks under a press or in a vibrating machine Kiln run.
  • Binder such as tar and / or pitch-provided mass of petroleum coke, shiny coal, soot or graphite formed into blocks under a press or in a vibrating machine Kiln run.
  • These green carbon blocks are in the cassettes of the Combustion chambers stacked on top of each other.
  • the moldings are perfect in a filling powder from e.g. Coke, such as petroleum coke, or anthracite embedded. Thereby are the molded articles stacked one on top of the other in a cassette and against each other the fire pit walls and floor separated.
  • the anodes are burned indirectly by heating the fire ducts with external ones mobile burners.
  • several combustion chambers become one Fire draft summarized, which is usually via a flue gas extractor to a flue gas ring line surrounding the entire furnace are connected.
  • a fire draft arrangement consists of a sealing chamber, a preheating chamber, a heating zone consisting of approximately three chambers and a cooling zone consisting of approximately six chambers.
  • the molded articles to be fired are first preheated, then in the fire area exposed to high temperature and finally cooled in the cooling area.
  • the number of chambers combined into a fire train is directed both according to the geometry of the cassettes and fire ducts as well as the fire management.
  • the number of fires on the other hand depends on the size of the furnace, i.e. on the number of chambers dependent.
  • the fire moves move cyclically and quasi continuously around the oven.
  • the binder is coked, causing the desired mechanical and electrical properties can be achieved.
  • the carbon-containing powder can oxidize the carbon body during the firing process be prevented.
  • the heating is usually done with gas, oil or liquid gas (Liquid Petroleum Gas, LPG).
  • LPG Liquid Petroleum Gas
  • the fired moldings are used, for example, as electrodes, in particular as anodes, for aluminum melt flow electrolysis according to Hall-Héroult.
  • the lifespan of such ring chamber furnaces is limited, so that each one after a few Years of operation must be completely renewed.
  • the repair includes in addition to replacing and rebuilding the combustion chambers, usually also renewing the tub construction.
  • the inner walls or the room dividers, which are special large heat loads are usually replaced and be rebuilt.
  • the invention is therefore based on the object of proposing an annular chamber furnace, the construction of which is comparatively little time-consuming on site. Furthermore, the ring chamber furnace and in particular its room divider as possible through constructive improvements achieve a long service life.
  • the object is achieved in that the tub constructions unite have at least partially modular structure and the room divider two at a distance mutually parallel inner walls forming an inner wall space contains, and the inner walls from on the foundation, floor or on floor elements arranged and laterally joined together, prefabricated inner wall elements one or containing a concrete material.
  • Cooling ducts run across the room divider, for example in the form of pipes, which are embedded in the foundation or floor of the tub structures or are concreted.
  • the cooling channels open to the central longitudinal axis (A) of the annular chamber furnace sideways into the central longitudinal shaft and step to the outside of the annular chamber furnace sideways from the foundation or floor.
  • the interior wall space is preferably continuous, i.e. in the longitudinal direction of the Ring chamber furnace without interruption, trained.
  • means for cooling the inner wall intermediate space are arranged in the interior wall space and / or on the front ends of the inner wall space, i.e. in the area of the end walls of the annular chamber furnace.
  • the means are preferably fans for generating a gas flow or one Air flow in the interior wall space.
  • the interior wall space can be closed off at the top by cover elements his.
  • the cover elements bridge the inner walls transversely to their longitudinal edges.
  • the cover elements on the one hand stabilize the inner walls against lateral deflection and also serve as work platforms between the two rows of combustion chambers.
  • the Cover elements expediently lie on or on the designated support surfaces the inner wall elements.
  • the cover elements can have openings for the purpose of air circulation exhibit; however, they are preferably designed without openings.
  • the tub constructions also contain a preferred embodiment on the foundation, Floor or on floor elements made of prefabricated outer wall elements created external walls.
  • the outer walls are arranged side by side the outer wall elements formed.
  • the feet are in the form of bottom arranged, one- or two-sided, foot-like widenings are designed and should guarantee the preferably anchoring-free stability of the wall elements.
  • integral means that the relevant parts, e.g. wall element and pedestal, from one Pieces are made.
  • the prefabricated exterior and / or Internal wall elements on their bottom end faces in the form of recesses Slot openings, bores or channels for receiving anchoring elements, in particular reinforcing bars, such as reinforcing bars.
  • the wall elements mentioned are according to this version on partial or one end in the foundation, the floor or in Floor elements inserted and secured anchoring elements, where put on means that the anchoring elements in the recesses of the wall elements are arranged to intervene.
  • the anchoring elements are also in the recesses secured. Secured means that the anchoring elements with the foundation or enter into a permanent, firm bond with the wall element.
  • the anchoring elements introduced into the recesses of the wall elements are for this purpose, preferably by inserting into the recesses via lateral filling openings Fastening material secured.
  • the side filling openings can be in the combustion chambers and / or side surfaces of the inner wall elements facing the inner wall intermediate space be arranged. It goes without saying that the filling openings do this should be in communication with the recesses.
  • the fastening material is there preferably from a concrete or cement mixture, which is in a flowable state is introduced and then cured.
  • wall elements with feet can also be used according to the above described or in any other way by means of anchoring elements, in particular by means of reinforcing bars, in the foundation, floor or in floor elements be anchored.
  • the room divider can also contain floor elements.
  • the inner wall elements are here with their bottom end faces preferably arranged on the central floor elements.
  • the inner wall elements can be placed on feet on the central floor elements be arranged and / or by means of anchoring elements with the central floor elements be firmly connected.
  • the anchoring elements are at one end in the central floor elements and elsewhere in recesses in the floor end surfaces of the inner wall elements fixed or fixed.
  • the room divider contains above the central one Central floor elements arranged in the longitudinal shaft. Cover the central floor elements the central longitudinal shaft, with channel openings in the central floor elements, in particular vertically arranged channel openings, gas exchange between the central longitudinal shaft and the interior wall space.
  • the interior wall elements can either be placed on or next to the central floor elements his.
  • the annular chamber furnace according to the invention preferably has dimensions of the entry orders of magnitude mentioned.
  • the interior wall space expediently has one Width, i.e. an expansion transverse to the longitudinal axis of the furnace, from 30 to 300 cm.
  • the width the interior wall space is preferably from 40 to 200 cm, in particular from 50 to 150 cm.
  • the wall thickness of the outer and inner wall elements is, for example, 15-35 cm, especially 20-30 cm.
  • the length, i.e. the expansion in the direction of the longitudinal axis of the furnace, the outer and inner wall elements can be, for example, 300-1000 cm, in particular 400-800 cm.
  • the outer and inner wall elements, the floor elements and the cover elements expediently from a concrete material, preferably from reinforced concrete, in particular made of reinforced concrete or reinforced concrete.
  • the reinforcement preferably consists of iron bars or iron bar grids.
  • the elements mentioned are preferably precast concrete parts such as cast concrete parts made by casting.
  • the end walls of the annular chamber furnace are also made Built up side-by-side end wall elements.
  • the end wall elements can using the same technique as the exterior and interior wall elements, i.e. by means of feet and / or by means of anchoring elements, in the manner described on the Foundation must be laid.
  • the end wall elements preferably have the same dimensions like the exterior and interior wall elements.
  • the end wall elements are appropriate from a concrete material, preferably from reinforced concrete, in particular from Reinforced concrete or reinforced concrete.
  • the elements mentioned are preferably precast concrete parts.
  • the wall elements are expediently mutually joined, for example by concreting the wall joints.
  • the tub construction is preferably built on a stable foundation, whereby the foundation can in turn be multi-layered.
  • the foundation Layer sequences with different types of concrete, such as lean concrete, gravel concrete and / or insulation concrete.
  • the foundation can also be unpaved Layers or intermediate layers of, for example, sand or gravel sand are provided his.
  • One or more of the entire surface or part of the surface can also be placed over the foundation arranged floor elements or floor slabs made of concrete, in particular reinforced Concrete such as reinforced concrete or reinforced concrete may be provided.
  • the base plate or base plates can also be part of the foundation.
  • the exact foundation structure is for present invention of secondary importance, which is why at this point detailed explanations are dispensed with.
  • the fans are preferably used in the area Air is drawn into the end walls of the tub constructions and into the interior wall space pressed. Because the room divider towards the top is preferred by the cover elements is completed, the feed air then escapes through the central one Longitudinal shaft and through the cooling channels to the outside of the annular chamber furnace, the Air flow at the outside longitudinal shafts from the cooling channels into the atmosphere exit.
  • the air flow generated by the fans cools on the one hand as it flows through of the inner wall space the inner walls and on the other hand when flowing through the Cooling channels the floor or the foundation.
  • the outer walls are also expediently cooled, the cooling using natural, Air circulation can take place outside the wall. Furthermore, the cooling can also forced air cooling stimulated by fans.
  • Another version provides that the cooling of the floor and the room divider in separate systems.
  • the structure of the ring chamber furnace corresponds essentially the previous statements with the difference that the cooling channels in the Continuous foundation of the annular chamber furnace from one side to the opposite side run and there is no connection to the interior wall space.
  • the invention further relates to a method for producing an annular chamber furnace with two parallel to each other, arranged in tub, trough or pool constructions Rows of combustion chambers, the tub constructions having outer walls and are separated from each other by a room divider.
  • the manufacturing process is characterized by the fact that the room divider is two at a distance inner walls running parallel to each other and forming an inner wall space contains, and each inner wall by side joining inner wall elements is formed, and the inner wall elements via integral feet on the foundation, Parked on the floor or on floor elements and / or via anchoring elements be anchored in the foundation, floor or in floor elements, and the interior wall space towards the top with the inner walls bridging across its longitudinal edges Cover elements is closed.
  • the outer walls are also by lateral Joining of outer wall elements formed, the outer wall elements via integral feet on the foundation, floor or on floor elements parked steadily and / or via anchoring elements in the foundation, in the floor or be anchored in floor elements.
  • the outer and / or inner wall elements are Anchoring elements, especially via reinforcing bars such as reinforcing bars, in the Foundation, floor or anchored in floor elements, the wall elements on their recesses in the form of slot openings, bores or Contain channels for receiving the anchoring elements, and the anchoring elements at one end in the foundation, the floor or in floor elements and the prefabricated wall elements on the foundation, the floor or the floor elements are placed, the anchoring elements in the other Engage recesses in the wall elements.
  • Anchoring elements especially via reinforcing bars such as reinforcing bars, in the Foundation, floor or anchored in floor elements, the wall elements on their recesses in the form of slot openings, bores or Contain channels for receiving the anchoring elements, and the anchoring elements at one end in the foundation, the floor or in floor elements and the prefabricated wall elements on the foundation, the floor or the floor elements are placed, the anchoring elements in the other Engage recesses in the wall elements.
  • fastening material in particular binding and curing Fastening material, preferably in a flowable form, for fixing the anchoring elements introduced into the recesses.
  • the annular chamber furnace of modular design according to the invention and the production method allow the ring chamber furnace to be assembled and assembled quickly.
  • the construction of the room divider according to the invention also allows efficient Cooling of the inner walls, which extends the life of the individual elements of the tub construction and the brickwork significantly extended.
  • the tub constructions 2a, 2b contain outer walls formed from prefabricated outer wall elements 102 3a, 3b (see FIG. 6) and are delimited from one another by a room divider 100.
  • the Room divider contains two spaced-apart and one interior wall space 101 forming inner walls 4a, 4b.
  • the interior walls are analogous to the room divider 110 formed from prefabricated inner wall elements.
  • the top is the Inner wall space 101 through a plurality of inner walls 4a, 4b transverse to their longitudinal edges bridging, plate-shaped prefabricated cover elements 8 covered.
  • the inner wall elements of the inner walls 4a, 4b form at their upper end section Inner wall intermediate space 101 from a balcony-like projection 14a, 14b, the the plate-shaped cover elements 8 rest on the balcony-like projection 14a, 14b.
  • the outer and inner wall elements also point towards the upper wall end cantilever 12a, 12b, 13a, 13b in the form of a Nose up.
  • the cantilever is preferably an integral part of the outer and / or inner wall elements and serves to cover an insulation layer on the inside of the wall, for example from insulating stones, such as foam stones, burnout stones or moler or calcium silicate stones.
  • a central longitudinal shaft 16, 36 in the foundation 6, 26 Open laterally in the longitudinal shaft 16, 36, in the Foundation 6, 26 embedded and cooling channels 7, 27 running transversely to the central longitudinal axis in the form of pipes, a.
  • the cooling channels occur on the side of the annular chamber furnace a longitudinal shaft 17, 37 running parallel to the outer wall 3a, 3b, 23a, 23b (Figs. 1 and 2).
  • the annular chamber furnace shown in FIG. 2, designed according to a second embodiment 21 contains two trough constructions each receiving a row of combustion chambers 51 22a, 22b (see also FIG. 7).
  • the tub constructions 22a, 22b contain outer wall elements 102 manufactured outer walls 23a, 23b (see also FIG. 6) and are against each other delimited by a room divider 110.
  • the room divider contains two at a distance Inner walls arranged with respect to one another and forming an inner wall intermediate space 101 24a, 24b.
  • the inner walls are formed from inner wall elements 9 (see FIG. 4).
  • the inner wall intermediate space 101 is transverse by a plurality of the inner walls 24a, 24b covers covering elements 28 bridging their longitudinal edges.
  • the cover element 28 is in the form of a hat profile, which in the interior wall space engages and rests with two side profile flanks on the upper wall edge, educated.
  • the lateral profile flanks overlap the inner walls 24a, 24b Formation of a nose 38a, 38b by a certain amount.
  • Central floor elements are located above and overlying the central longitudinal shaft 36 33 arranged (see also Fig. 6), which to ensure gas exchange 36 vertical channel passages 32 between the inner wall space and the longitudinal shaft contain.
  • the central floor elements 33 contain a spacer, elevated middle section 39, to which two side flanks 40 adjoin via a shoulder 41. Reinforcing bars become one end of the free horizontal surfaces of the side flanks 40 31 embedded and anchored (see also Fig. 3).
  • the inner wall elements 9 are placed on the side flanks 40, forming a stop for paragraph 41, the reinforcing bars protruding from the central floor elements 33 31 engage in recesses in the bottom end faces of the inner wall elements 9.
  • the inner wall elements 9 contain laterally arranged and with the recesses corresponding filling openings 34, through which after assembly and alignment of the inner wall elements fastening material for fixing the reinforcing bars 31 is inserted into the inner wall elements.
  • the outer wall elements 102 point toward the upper wall end toward the combustion chambers directed projection 29a, 29b in the form of a nose.
  • the cantilever is expediently an integral part of the outer wall elements 102 and serves as well Lugs 38a, 38b of the cover elements 28 of the covering of a wall-side insulation layer.
  • the inner walls are cooled by means of those arranged in the inner wall intermediate space 101 Fans 10, 30 which air from the front ends of the tub structures suck. Since the room divider 100, 110 is closed towards the top, the injected escapes Air subsequently in through the longitudinal shaft 16, 36 through the cooling channels 7, 27 Outside. The air flow exits the cooling ducts at the outside longitudinal shafts 17, 37 into the atmosphere.
  • the air flow 115 generated by the fans 10, 30 on the one hand cools the inner walls 4a when flowing through the inner wall space, 4b, 24a, 24b and on the other hand when flowing through the cooling channels 7, 27 the floor or the foundation 6, 26.
  • the air flow from the interior wall space 101 flows through the channel passages 32 of the central floor element 33 in the central longitudinal shaft 36 and through the Cooling channels 27 to the outside.
  • the tub constructions of the ring chamber furnaces 1, 21 according to the first and second Design variants are closed at the end by end walls 35 (FIGS. 4 and 6).
  • the tub construction 2a according to FIG. 8, which is equipped with combustion chambers, contains one the outer and inner wall and on the floor towards the combustion chambers Insulation layer 56.
  • the wall-side insulation layers become the upper wall termination covered by the cantilever described in the wall element.
  • the cantilever is expediently an integral part of the outer and / or inner wall element or in the case of the room divider, the cover element also differs in design (see also Fig. 2).
  • the combustion chambers are separated by fire shafts 54 into those to be burned Shaped body 55 receiving cassettes 52 divided.
  • Fig. 7 shows a schematic arrangement of an annular chamber furnace 1, 21 in plan view.
  • the Trough constructions 2a, 2b, 22a, 22b contain combustion chambers arranged in two rows 51, which in turn are divided into cassettes 52.
  • the combustion chambers 51 are delimited in the transverse direction by belt walls 53.
  • the room divider 120 according to FIG. 9 differs from the exemplary embodiments according to FIG 1 and 2 essentially in that the ventilation of the inner wall space 101 takes place separately from the ventilation of the tub floor.
  • the inner walls 124a and 124b are analogous to the exemplary embodiment according to FIG. 2 by means of reinforcing bars 31 anchored in central floor elements 123. In contrast to Fig. 2 are in the floor elements 123 no channel openings necessary.
  • the inner walls 124a, 124b can also analogous to the embodiment according to FIG. 1 by means of feet on the tub floor be turned off.
  • fans 10 are used on the front ends of the tub construction Air sucked in through openings in the upper end of the room divider 120 is released to the environment.
  • the upper end of the room divider 120 can contain cover elements 128, as in the exemplary embodiments according to FIGS. 1 and 2, wherein the cover elements 128 have air outlet openings in this embodiment. Furthermore, there is no need for cover elements, so that the upper end is one contains opening slot running parallel to the central longitudinal axis A.
  • Cooling channels 127 running in the foundation 126 are inserted transversely to the central longitudinal axis A, which continuously from one side to the opposite side of the annular chamber furnace run.
  • On one side of the annular chamber are means, preferably Fans, for feeding a cooling medium, preferably air, into the cooling channels provided (not shown).
  • the cooling medium circulating through the cooling channels 127 occurs on the opposite annular chamber furnace side from the cooling channels 127.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP01810937A 2001-07-10 2001-09-26 Four à feu tournant à chambres Withdrawn EP1275924A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2002/006643 WO2003006905A1 (fr) 2001-07-10 2002-06-17 Four de cuisson du type circulaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH12672001 2001-07-10
CH12672001 2001-07-10

Publications (1)

Publication Number Publication Date
EP1275924A1 true EP1275924A1 (fr) 2003-01-15

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Family Applications (1)

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EP01810937A Withdrawn EP1275924A1 (fr) 2001-07-10 2001-09-26 Four à feu tournant à chambres

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100520262C (zh) * 2006-12-01 2009-07-29 郭选锋 烧结耐火材料的窑炉及其烧结耐火材料的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB801943A (en) * 1956-04-25 1958-09-24 Edward David Bacheler Russell Improvements in or relating to kilns for firing articles consisting of clay or brick earth or the like
GB1118329A (en) * 1965-10-08 1968-07-03 Alusuisse Multi-compartment kilns
US4086740A (en) * 1975-10-10 1978-05-02 Foseco Trading A.G. Blocks of refractory concrete

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB801943A (en) * 1956-04-25 1958-09-24 Edward David Bacheler Russell Improvements in or relating to kilns for firing articles consisting of clay or brick earth or the like
GB1118329A (en) * 1965-10-08 1968-07-03 Alusuisse Multi-compartment kilns
US4086740A (en) * 1975-10-10 1978-05-02 Foseco Trading A.G. Blocks of refractory concrete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100520262C (zh) * 2006-12-01 2009-07-29 郭选锋 烧结耐火材料的窑炉及其烧结耐火材料的方法

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