EP2921807A1 - Agencement de four - Google Patents

Agencement de four Download PDF

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Publication number
EP2921807A1
EP2921807A1 EP15158656.7A EP15158656A EP2921807A1 EP 2921807 A1 EP2921807 A1 EP 2921807A1 EP 15158656 A EP15158656 A EP 15158656A EP 2921807 A1 EP2921807 A1 EP 2921807A1
Authority
EP
European Patent Office
Prior art keywords
furnace
support surface
outlet opening
slot
shaped outlet
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
EP15158656.7A
Other languages
German (de)
English (en)
Other versions
EP2921807B1 (fr
Inventor
Jochen Dr. Volkert
Ernst Keim
Ulrich Schlegel
Marvin Birckigt
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.)
GVP Gesellschaft zur Vermarktung der Porenbrennertechnik mbH
Original Assignee
GVP Gesellschaft zur Vermarktung der Porenbrennertechnik mbH
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 GVP Gesellschaft zur Vermarktung der Porenbrennertechnik mbH filed Critical GVP Gesellschaft zur Vermarktung der Porenbrennertechnik mbH
Publication of EP2921807A1 publication Critical patent/EP2921807A1/fr
Application granted granted Critical
Publication of EP2921807B1 publication Critical patent/EP2921807B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D3/123—Furnace cars
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3623—Heaters located under the track
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0085—Movement of the container or support of the charge in the furnace or in the charging facilities
    • F27D2003/0091—Horizontally
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D2003/125—Charging cars, lift trolleys

Definitions

  • the invention relates to a furnace assembly, as used for example for firing ceramic workpieces or for the heat treatment of steel.
  • a shuttle kiln forms an oven assembly comprising an oven having a bottom and side walls extending therefrom. In the sidewalls, punctiform burners are provided above the bottom along the sidewalls.
  • the known furnace arrangement on a carriage for receiving fuel or burning workpieces.
  • the carriage has a first support surface provided at a predetermined distance from the ground.
  • On the first support surface usually made of steel or cast steel support profiles or support are supported, which for example have a width of 200 to 400 mm and a length of 1000 to 2000 mm.
  • the carriers have a trapezoidal profile and are supported on the first support surface transversely to the transport direction of the hearth car.
  • the supports to be fired are supported on the supports.
  • the arrangement of the carrier usually depends on the geometry of the workpieces to be supported.
  • the furnace arrangement known from the prior art has the disadvantage that the exhaust gases are not distributed homogeneously therein. During the firing process, zones with a different temperature are formed in the furnace chamber. As a result, the workpieces are not always homogeneously heated or fired or sintered due to their geometry.
  • the DE 1 433 722 B discloses a gas- or oil-fired heating furnace with one or more zones whose predominantly different temperature is separately controllable to achieve any annealing programs.
  • the object of the invention is to eliminate the disadvantages of the prior art.
  • a furnace arrangement is to be specified, which is characterized during the firing process by a particularly homogeneous temperature distribution in the furnace.
  • a furnace assembly comprising an oven having a bottom and side walls extending therefrom, wherein at least one surface burner having a slot-shaped outlet opening for hot exhaust gases extending at a predetermined first distance above the bottom along the side wall is provided on at least one of the two side walls, wherein the slot-shaped outlet opening in the extension direction has a length and perpendicular to a height, a supported on the ground exhaust distribution device which forms a second spaced from the ground first support surface, the second distance at least equal to the height of the slot-shaped outlet opening, so that the operating exiting therefrom exhaust gases formed in a between the bottom and the first support surface Be led exhaust distribution space, and wherein the first support surface has openings for discharging the exhaust gases from the exhaust gas distribution space in a furnace chamber located above it.
  • a "surface burner” is used according to the invention. It is a fully pre-mixed burner in which a mixture of gas and air is burned.
  • the area burner includes in the sense of the present description, a slit-shaped outlet opening arranged downstream of the burner downstream in the side wall of the furnace. From the surface burner only hot "fuel gases” or “exhaust gases” come out. Ie. In departure from the prior art, the floor is not exposed to free flames, but only with hot exhaust gases.
  • an exhaust gas distribution device supported on the floor which forms an exhaust gas distribution space.
  • the exiting from the slit-shaped outlet opening hot exhaust gases are fed into the exhaust distribution space.
  • a first support surface bounding the exhaust gas distribution space to the furnace chamber has openings for discharging the exhaust gases from the exhaust gas distribution space.
  • the first support surface has the function of distributing the exhaust gases evenly over the furnace space.
  • burning workpieces can be supported directly.
  • the proposed furnace arrangement is distinguished during operation by a particularly homogeneous temperature distribution in the furnace chamber. This makes it possible to homogeneously heat workpieces over their entire geometry or burn or sinter.
  • an "furnace” is to be interpreted broadly. It is generally a device for the thermal treatment of a workpiece.
  • an "oven” may be a stationary oven, for example a chamber oven, a shuttle oven, a continuous furnace or the like. But it may also be that parts of the furnace, in particular the ceiling and / or the side walls are movable.
  • an "oven” can also be a hood oven in which the ceiling together with the side walls form a hood that can be lifted off the floor.
  • a hood furnace can also be designed so that the material is separated from the exhaust gases by means of an additionally integrated in the furnace chamber hood.
  • an indirect heating of the material takes place.
  • an area enclosed by the hood interior is advantageously filled with a protective gas.
  • it may be in the oven to act a sliding furnace, in which a hood of the furnace is raised only so far that the connection between the bottom and the side walls is released.
  • the oven can be designed so that the floor is designed in such a length that the hood can be placed in two different positions with respect to the ground. This makes it possible to operate the furnace quasi continuously, wherein in a first position, a thermal treatment takes place, while unloading in the second position, an already thermally treated Good or the second position is loaded with a material to be thermally treated.
  • the material to be treated can also be transported continuously through the oven.
  • the oven may be a blast furnace, reciprocating hearth furnace, walking beam furnace, rotary hearth furnace, roller hearth furnace or stepping furnace.
  • an opening area formed by the apertures decreases towards the side walls. This allows a particularly homogeneous distribution of the hot exhaust gases in the furnace chamber.
  • the first support surface can be subdivided into a multiplicity of surface elements of equal size. Such surface elements are advantageously square.
  • the "opening area" per surface element results from the area of the surface element minus the areas formed by the openings.
  • the surface elements selected for determining the opening area are usually dimensioned such that they have at least one, preferably two, openings.
  • each surface burner in each case with a slot-shaped outlet opening for hot exhaust gases which extends at a predetermined first distance above the floor along the respective side wall.
  • a plurality of surface burners may be provided in succession, the slot-shaped outlet openings adjoin one another, so that along at least one of the side walls over a substantial Part whose length extending successive slot-shaped outlet openings in the first distance from the ground.
  • the plurality of slot-shaped exit openings may also be connected to a single slot-shaped exit opening extending over a substantial portion of the length of the side wall.
  • the proposed slot-shaped outlet openings allow a homogeneous heat input over the entire length of the slot-shaped outlet opening opposite exhaust gas distribution space.
  • the exhaust distribution space is, for. B. perpendicular to a transport direction of a car, a temperature profile, which along a, z. B. extending in the transport direction of the car, length of the exhaust distribution space is substantially constant.
  • At least one porous plate having an open pore space is inserted into the slot-shaped outlet opening.
  • the provision of a porous plate serves to equalize the velocity and the temperature of the hot exhaust gases emerging from the slot-shaped outlet opening. This also contributes to the formation of a uniform temperature profile over the length of the exhaust distribution space.
  • extending rails are provided on the floor parallel to the side walls on which a carriage is supported for receiving fuel, which has a provided at a predetermined third distance from the ground second support surface, wherein the third distance corresponds to the first distance or smaller as the first distance is.
  • the first support surface is formed of at least one, the apertures having metal plate which is supported on supported on the bottom or the second support surface support means.
  • the support means are made for example of steel or cast steel. They have a triangular, trapezoidal or rectangular profile. Perpendicular to a direction of extension of the profile, the support means may have further breakthroughs.
  • the support means are expediently placed on the second support surface such that an extension direction of the profile runs perpendicular to the transport direction of the carriage.
  • the support means may be arranged, for example, at a distance of 100 to 500 mm substantially parallel to each other.
  • a plurality of metal plates may also be placed in abutting arrangement on the support means.
  • the metal plates may extend over the length of the bottom or the second support surface and have a width which corresponds to only a fraction of the width of the bottom or the second support surface. It can be provided metal plates whose openings form a total of different sized opening areas. Thus, by juxtaposing a plurality of metal plates, an opening area decreasing toward the side walls can be easily realized.
  • the support means may have recesses on the upper side facing the first support surface.
  • the metal plates for forming the first support surface may be formed so that they have to the support means extending engagement elements, such as tongues, which engage for fixing the position of the metal plates in the recesses of the support means.
  • the metal plates are thus formed bridge-like and each span a gap, which is formed between two parallel support means.
  • these may be formed in the manner of U-profiles.
  • the two legs of the U-profiles in this case form the long sides of the U-profile.
  • the engaging elements are on the short sides provided the U-profile. In the assembled state, the legs of the U-profile also in the direction of the exhaust distribution space.
  • support bridges may be supported, which also span the intermediate space formed between two parallel support means.
  • the support bridges serve to remove a high load caused by heavy firing. By using the support bridges, the load acting through the fuel can be removed particularly safe and reliable on the car.
  • the first support surface can also be realized by juxtaposing support means with rectangular profiles.
  • the first support surface is formed by a cover surface of the profile opposite the bottom or the second support surface.
  • the apertures are provided in the top surface, such that an opening area formed by the apertures increases from the sidewalls toward the center of the first support surface.
  • the support means and / or the support bridges may be made of metal or ceramic.
  • the support means are arranged on the second support surface, that the extension direction of the profile is perpendicular or oblique to the side walls.
  • the arrangement of the support means is chosen so that the most homogeneous temperature distribution in the furnace chamber is achieved.
  • the second support surface may be provided on its upper side facing the exhaust distribution space with a thermal insulation. It may be, for example, a ceramic fiber material or another high temperature resistant insulation material.
  • At least one further surface burner with an extending in the side wall at least one of the two side walls another slot-shaped outlet opening provided for hot exhaust gases, wherein the further slot-shaped outlet opening opens above the first support surface in the furnace chamber.
  • the further slot-shaped outlet opening can extend in particular in the vicinity of a ceiling of the furnace in at least one of the two side walls.
  • a plate is arranged opposite the further slot-shaped outlet opening in the oven chamber in order to guide the hot exhaust gases guided through the further slot-shaped outlet opening into the oven chamber in the direction of the first support surface.
  • the plate expediently runs in sections parallel to the side wall such that a transport space above the first support surface remains free.
  • the further slot-shaped outlet openings can be configured analogously to the slot-shaped outlet openings.
  • at least one further surface burner with a further slot-shaped outlet opening for hot exhaust gases extending in the side wall may be provided on each of the side walls, wherein the further slot-shaped outlet openings open above the first support surface into the furnace chamber. This allows a particularly homogeneous temperature distribution can be achieved within the furnace chamber.
  • At least one further surface burner with a further outlet opening provided in the ceiling for hot exhaust gases is provided on the ceiling.
  • the further outlet opening may be rectangular, round or slot-shaped.
  • the further outlet opening may be arranged downstream of an exhaust gas distribution plate extending in the furnace chamber parallel to the ceiling, which is formed from at least one further metal plate having further openings.
  • the exhaust distribution plate may be formed similarly to the first support surface defining the exhaust distribution space toward the furnace room. The exhaust distribution plate distributes the exhaust gases evenly across the furnace space and helps to deliver the exhaust gases at a uniform flow rate in the furnace chamber in the direction of the combustible material.
  • At least one porous plate having an open pore space is inserted into the slot-shaped outlet opening and / or the further outlet opening.
  • the provision of a porous plate serves to equalize the velocity of the hot exhaust gases emerging from the slot-shaped or further outlet opening. This also contributes to the formation of a uniform temperature profile over the length of the exhaust distribution space.
  • an oven generally designated by reference numeral 1
  • a rear wall and a gate for loading and unloading the furnace 1 are not shown here.
  • a from the bottom 2, the side walls 3 and a ceiling 4 of the furnace 1 enclosed furnace chamber is designated by the reference numeral O.
  • slot-shaped outlet openings 5 for hot exhaust gases extend in the side walls 3.
  • a mounted outside the furnace chamber O burner for generating the hot exhaust gases is not shown here for clarity. It can be a conventional burner operated with gas or oil.
  • the slot-shaped outlet opening 5 may be closed by a porous plate 6.
  • the porous plate 6 is formed so that it has an open pore space and thus allows passage of the hot exhaust gases into the furnace chamber O.
  • Reference numeral 7 designates a carriage which is guided by means of wheels 8 on rails 9 provided on the floor 2.
  • the carriage 7 has a second support surface 10 on which a first support means 11 is supported.
  • metal plates 12a, 12b, 12c, 12d are supported in a transport direction T extending perpendicularly to the plane of the paper.
  • the metal plates 12a, 12b, 12c, 12d form a first support surface 13.
  • workpieces 14 On the first support surface 13 are indicated here by broken lines indicated workpieces 14, which are introduced for firing in the furnace chamber O.
  • the second support surface 10 has a third distance A3 from the bottom 2.
  • the third distance A3 corresponds to the first distance A1 or is smaller than the first distance A1.
  • the reference H denotes a height of the slot-shaped outlet opening 5.
  • the second support surface 10 and the first support surface 13 are spaced from each other by a second distance A2.
  • the second distance A2 is greater than the height H.
  • an exhaust distribution space B is formed between the second support surface 10 and the first support surface 13.
  • the height H of the slot-shaped outlet opening 5 is at most so large that it corresponds to a (not shown in detail here) further height of the exhaust gas distribution space B.
  • Fig. 2 shows a plan view along the section line AA 'in Fig. 1 , Out Fig. 2
  • the metal plates 12a, 12b, 12c, 12d each have first openings 15.
  • a first opening area formed by all first openings 15 of a first metal plate 12a is smaller than a second opening area formed by all the first openings 15 of a second metal plate 12b.
  • the second opening area of the second metal plate 12b is smaller than a third opening area formed by all the first openings 15 of a third metal plate 12c.
  • the third opening area is smaller than a fourth opening area formed by all the first openings 15 of the fourth metal plate 12d.
  • the strip-shaped metal plates 12a, 12b, 12c, 12d are supported in their longitudinal direction substantially parallel to the transport direction T abutting on the first support means 11, which are indicated here by broken lines. Because of the arrangement of the metal plates 12a, 12b, 12c, 12d, an opening area formed by the first openings 15 increases from the side walls 3 to a center therebetween.
  • Out Fig. 2 It can also be seen that along the side walls 3 a plurality of slot-shaped outlet openings 5 are provided with a length L, which are arranged successively.
  • the plurality of slot-shaped outlet openings 5 can also be combined to form a single slot-shaped outlet opening 5, which extends over substantially the entire length L of the metal plates 12a, 12b, 12c, 12d in the transport direction T.
  • Fig. 3 shows a first support means 11 in a perspective view.
  • the first support means 11 has a trapezoidal profile. Perpendicular to an extension direction of the profile second openings 16 are provided in profile side walls. In a first profile ceiling 17a further third openings 17 are provided. In particular, the second openings 16 serve to homogenize the heat distribution within the exhaust gas distribution space B in the transport direction T.
  • second support means 18 In contrast to that in the Fig. 1 to 3 shown embodiments are in Fig. 4 supported on the second support surface 10 second support means 18, whose configuration in particular from the FIGS. 5 and 6 closer.
  • the second support means 18 have in profile a rectangular cross-section.
  • the first apertures 15 are arranged in a second profiled cover 18a of the second support means 18 such that an opening surface formed by the first apertures 15 becomes a center of the first Support surface 13 increases towards.
  • the Fig. 7 to 22nd show a third furnace arrangement.
  • a top of the second support surface 10 facing the exhaust distribution space B is covered with a thermally insulated layer 19.
  • the thermally insulating layer 19 may be made of a ceramic material, for example.
  • Third support means 20 are supported on the second support surface 10.
  • the second support surface 10 may be made of metal in this case. It is because of the provision of the thermally insulating layer 19 in this case, no longer required that the second support surface 10 is part of a solid, made of refractory concrete plate. Thus, the carriage 7 can be made considerably easier. Because of the weight savings heat energy can be saved.
  • the thermally insulating layer 19 may extend from the top of the second support surface 10 to the first distance A1.
  • the reference numeral 21 designates burners which are mounted on both sides of the exhaust distribution space B in a side wall of a furnace 1 (not shown here) in such a way that the exhaust gases produced during operation in the exhaust distribution space B formed between the second support surface 10 and the first support surface 13 be guided.
  • the first support surface 13 is formed here of a plurality of profile plates 22, edge profile plates 23 and side profile plates 24.
  • the third support means 20 have recesses 25 on their upper side facing the first support surface 13.
  • the profile sheets 22 are formed in the manner of a U-profile. From a first profile cover plate 26 extend legs 27, which form the long sides of the profile sheets 22. From the short sides of the first profile cover plate 26, first metal tongues 28 extend in the same direction as the legs 27. The first profile cover plate 26 has fourth openings 29. The legs 27 are provided with fifth openings 30.
  • first metal tongues 28 in the recesses 25 adjacently arranged third support means 20 a engage in the assembled state, engage in the assembled state, the first metal tongues 28 in the recesses 25 adjacently arranged third support means 20 a.
  • the profile sheets 22 thus form a bridge between two adjacently arranged third support means 20.
  • Die in 17 to 19 shown edge profile sheets are similar to the profile sheets 22 designed. They also have a first profiled cover plate 26, from which branches 27 and first metal tongues 28 extend in the manner of a U-profile.
  • the edge profile plates 23 are designed asymmetrically in their longitudinal extent, whereas the profile plates 22 are configured symmetrically in their longitudinal extent.
  • FIG. 7 and 8th shows the profile sheets 22 and the edge profile plates 23 with the third support means 20 a cross-connection, by the first metal tongues 28 respectively engage in the recesses 25 of the third support means 20.
  • the exhaust gas distribution space B is further limited on its two short sides by means of side profile plates 24.
  • a side profile sheet 24 is in the FIGS. 20 to 22 shown.
  • From a second profile cover plate 30a extends a second metal tongue 31 and a cover plate 32.
  • the cover plate 32 is provided by means of slot-like sixth openings 33.
  • the second profile cover plate 30a has seventh apertures 34.
  • the side profile sheet 24 is in the manner of an L-profile designed.
  • the second metal tongue 31 extends in the same direction as the cover plate 32.
  • support bridges 35 may be supported on the first support surface 13 formed from the juxtaposed first 26 and second profile cover plates 30a.
  • a support bridge 35 is in the Fig. 11 to 13 shown. It is designed in the manner of a square tube profile, which can be provided in two opposite side walls with eighth openings 36. Another length L1 of the profile bridges 35 is dimensioned so that they can also be supported via two adjacently arranged third support means 20 in the manner of a bridge.
  • a flow rate and a temperature of the hot exhaust gases decrease from the sidewalls 3 to an intermediate center.
  • the opening area formed by the first openings 15 is compensated towards the center. It results in both embodiments of the furnace assembly, a particularly homogeneous temperature distribution in the furnace chamber O.
  • a gap between the adjacent metal plates 12a, 12b, 12c, 12d or the adjacent second support means 18 may be provided with suitable high temperature resistant Sealants, such as fiber mats, sealing cords or the like. Be sealed.
  • suitable high temperature resistant Sealants such as fiber mats, sealing cords or the like. Be sealed.
  • the further height of the exhaust distribution space B can be varied by introducing insulation means, for example ceramic mats or the like.
  • the openings 15, 16, 17, 29, 30, 33, 34, 36 may be of equal size. But they can also be designed differently sized. They can be round, oval, slit-shaped or otherwise geometrically designed.
  • the first support surface 13 is substantially formed by a plurality of profiled sheets 22 which extend in their longitudinal extent only from a third support means 20 to the adjacent third support means 20.
  • the recesses 25 in the third support means 20 are arranged and dimensioned such that the profiled sheets 22 and edge profiled sheets 23 inserted therein with the first metal tongues 28 lie flush against one another and thus form the first support surface 13. Because of the provided in the profile sheets 22 and the edge profile sheets 23 fourth openings 29 a uniform distribution of the exhaust gas distribution chamber B supplied hot exhaust gases in the oven chamber O is achieved.
  • Burning workpieces 14 can be supported directly on the first support surface 13 or indirectly via the support bridges 35 on the first support surface 13.
  • Fig. 23 shows the example of the second furnace arrangement according to Fig. 4 an embodiment which is applicable to all the above-described furnace arrangements.
  • more burners 37 are arranged outside the furnace space O above the first support surface 13 in the region of the side walls 3.
  • the further burners 37 discharge hot exhaust gas through the further slot-shaped outlet openings 5 'into the furnace space O.
  • the further slot-shaped outlet openings 5 'advantageously also extend over the length L. They can have the height H.
  • the further outlet openings 5 '- as in Fig. 23 is shown - plates 38 upstream.
  • the plates 38 may be made of metal or ceramic. They serve to guide the exhaust gases emitted from the further burners 37 in the direction of the first support surface 13.
  • the plates 38 may be angled in a ceiling 4 facing portion to the adjacent side wall 3 out.
  • the plates 38 also have the function of uniformly heating the furnace chamber O by radiant heat emitted thereby.
  • the plates 38 thus serve, on the one hand, to guide the exhaust gas flow and, on the other hand, to indirectly heat the oven space O.
  • apertures for example slots or the like, can be provided in the plates 38 at suitable positions.
  • the plates 38 advantageously extend at least in sections parallel to the side walls 3.
  • the carriage 7 is omitted.
  • the above-mentioned second support surface 10 here corresponds to the bottom 2.
  • the first distance A1 can be 0.
  • the exhaust gas distribution device is supported directly on the floor 2.
  • the exhaust gas distribution device has a first support surface 13 spaced from the bottom 2 at a second distance A2.
  • the second distance A2 corresponds at least to the height H of the slot-shaped outlet openings 5, so that the exhaust gases exiting therefrom during operation are guided into an exhaust gas distribution space B formed between the base 2 and the first support surface 13.
  • the exhaust gas distribution device is supported on the bottom 2 instead of on the second support surface 10 in the fourth furnace arrangement.
  • At least one further outlet opening can also be provided in the ceiling 4.
  • the further outlet opening is outside the oven space O - similar to in Fig. 23 shown - assigned to another burner, which in turn is a gas operated surface burner.
  • Parallel to the ceiling 4 may be mounted at a predetermined distance within the furnace space O (not shown here) exhaust distribution plate.
  • the predetermined distance may be, for example, a distance which corresponds approximately to the second distance A2.
  • the predetermined distance can be 15 to 50 cm.
  • the exhaust distribution plate can - similar to the first support surface 13 forming metal plate - have further breakthroughs.
  • the shape and arrangement of the apertures may be as in the case of the first support surface 13 forming metal plate.
  • the exhaust distribution plate can also be provided from the ceiling 4 in the direction of the bottom 2 extending exhaust distribution body.
  • the exhaust gas distribution body is arranged downstream of the further outlet opening downstream and extends into the furnace space O. Its shape can be designed corresponding to a burning or drying material.
  • the exhaust distribution body may be dome-shaped, frusto-conical, cylindrical, conical or the like. Breakthroughs may also be provided in the exhaust distribution body.
  • the exhaust distribution body is suitably made of metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Details (AREA)
EP15158656.7A 2014-03-11 2015-03-11 Agencement de four Not-in-force EP2921807B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014204453.7A DE102014204453B3 (de) 2014-03-11 2014-03-11 Ofenanordnung

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EP2921807A1 true EP2921807A1 (fr) 2015-09-23
EP2921807B1 EP2921807B1 (fr) 2016-09-21

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EP15158656.7A Not-in-force EP2921807B1 (fr) 2014-03-11 2015-03-11 Agencement de four

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EP (1) EP2921807B1 (fr)
DE (1) DE102014204453B3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015226554A1 (de) 2015-11-23 2017-05-24 Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh Ofen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2386835A (en) * 1942-07-04 1945-10-16 Kelley Island Lime And Transp Kiln
DE1433722B2 (de) 1963-08-22 1970-08-13 Deutsche Edelstahlwerke Ag, 4150 Krefeld Gas- oder ölbeheizter Wärmofen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2386835A (en) * 1942-07-04 1945-10-16 Kelley Island Lime And Transp Kiln
DE1433722B2 (de) 1963-08-22 1970-08-13 Deutsche Edelstahlwerke Ag, 4150 Krefeld Gas- oder ölbeheizter Wärmofen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Thermoprozesstechnik", vol. 2, VULKANVERLAG EIN HERDWAGENOFEN BEKANNT

Also Published As

Publication number Publication date
EP2921807B1 (fr) 2016-09-21
DE102014204453B3 (de) 2015-06-03

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