EP3343106B1 - Appareil de chauffage avec arrangement de buses pour postcombustion - Google Patents

Appareil de chauffage avec arrangement de buses pour postcombustion Download PDF

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Publication number
EP3343106B1
EP3343106B1 EP17206702.7A EP17206702A EP3343106B1 EP 3343106 B1 EP3343106 B1 EP 3343106B1 EP 17206702 A EP17206702 A EP 17206702A EP 3343106 B1 EP3343106 B1 EP 3343106B1
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EP
European Patent Office
Prior art keywords
hollow profile
heating device
hollow
flow
better
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EP17206702.7A
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German (de)
English (en)
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EP3343106A1 (fr
Inventor
Heribert Posch
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B10/00—Combustion apparatus characterised by the combination of two or more combustion chambers
    • F23B10/02—Combustion apparatus characterised by the combination of two or more combustion chambers including separate secondary combustion chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
    • F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
    • F23B80/04—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for guiding the flow of flue gases, e.g. baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/04—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air beyond the fire, i.e. nearer the smoke outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/185—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
    • F24B1/189—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by air-handling means, i.e. of combustion-air, heated-air, or flue-gases, e.g. draught control dampers 
    • F24B1/19—Supplying combustion-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation
    • F24B5/025—Supply of secondary air for completing combustion of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/028—Arrangements combining combustion-air and flue-gas circulation

Definitions

  • the invention relates to a heating device for solid fuels such as wood, and specifically the primary extraction for the flue gases from the primary combustion chamber into a downstream afterburning chamber.
  • the primary vent often consists of a kind of grate - even if it is vertical because the flow direction in the primary vent is horizontal - of hollow profiles arranged next to one another at a distance, through the interior of which the secondary air is supplied and is released through outlet openings into the passages between the hollow profiles.
  • These passages are preferably narrowing passages due to the cross-sections of the hollow bodies increasing in the flow direction and act as a nozzle so that the acceleration of the flue gases that occurs automatically sucks the secondary air into the flue gas flow without an additional fan or the like.
  • the flow velocity must not exceed a certain limit value, as otherwise the flame reaching through the primary exhaust with the flue gases will break off and the combustion in the afterburning chamber will initially be interrupted, usually restarted a short time later by a deflagration, which must be avoided is applicable.
  • This extension causes a reverse vortex of the flowing gas mixture to appear on the back of the hollow profile near the protrusions.
  • the gases flowing in a laminar manner through the nozzle arrangement are swirled, so that the gas components, i.e. the flue gases with the secondary air, are particularly well mixed, which improves the completeness of the post-combustion.
  • the outlet openings are - in the flow direction of the exhaust gases passing through the grate made of hollow bodies - arranged at the widest point of the hollow profile.
  • a generic primary vent of a heating device for solid fuels has a plurality of hollow profiles which are spaced apart from one another transversely to their directions of course, which preferably run parallel to one another.
  • the smoke gases pass through the at least one clear passage between two adjacent hollow profiles, whereby they are accelerated, since the clear passage between the adjacent hollow profiles represents a narrowing of the previous total flow cross-section and these clear passages act as nozzle slots.
  • Secondary air or recirculated flue gas is added to the flue gases, which are introduced into the interior of the hollow profiles and released to the flue gases flowing through through outlet openings that are arranged in the circumference of the hollow profile, preferably at the location of the nozzle slot, i.e. the clear passage.
  • the object is achieved in that the outer surfaces of the hollow profiles approach each other towards the rear from the widest point of the hollow profiles in the direction of flow in which the flue gases flow through the passage, i.e. against the longitudinal center plane of the hollow profile running in the direction of flow , approach and each end in a tear-off edge.
  • the two tear-off edges can have a smaller, equal or larger spacing in the transverse direction than the greatest width of the outer circumference of the hollow profile.
  • the back plate which connects the two tear-off edges and which forms the rear part of the hollow profile, which is usually in one piece, has a concave outer contour.
  • the hollow profiles are preferably designed symmetrically to their longitudinal center plane, which includes the direction of extent. If the hollow profiles are built into a primary exhaust, the direction of flow of the smoke gases flowing through the primary exhaust is also in or parallel to this longitudinal center plane.
  • inverted eddies is further promoted by the concave rear side of the hollow profile, that is to say the concave outer contour of the back plate, which forms the rear part of the hollow profile.
  • the type of turbulence and the shape of the reversing vortices that are formed can be determined.
  • the supply of secondary air or recirculated flue gases into the hollow profiles is preferably carried out via one of the end faces into the hollow profile.
  • the other end face is then of course tightly closed so that the hollow profiles only have one inlet opening for the secondary air and the outlet openings, usually a large number of outlet openings arranged in the direction of extent of the hollow profile on both sides in the side surfaces.
  • these outlet openings are preferably arranged in front of or at the latest at the widest point of the outer contour.
  • Another variant is to arrange these in the back plate, which experience has shown is not quite as efficient.
  • the shape of the trailing edge is of great importance for the optimal formation of the reversal eddy: it is preferably designed with a V-shaped cross-section, i.e. it forms a cutting edge in which the edge radius considered in the direction of the hollow profile and thus also the trailing edge is less than 2 mm , better is less than 1mm, better is less than 0.5mm, better is less than 0.3mm, better is less than 0.2mm.
  • the cutting edge angle i.e. the angle of the V-shaped trailing edge viewed in cross-section, should be acute-angled, preferably less than 85 °, better less than 80 degrees, better less than 75 degrees, better less than 35 degrees, better less than 30 degrees.
  • the rear side, i.e. the outer surface, of the back plate merges into this tear-off edge, which is designed as a cutting edge, and its outer contour without a shoulder and without a kink Kink radius of more than 2 mm, especially more than 4 mm, especially more than 6 mm.
  • curvature or curvature of the concave outer surface of the backplate also plays an important role.
  • their radius of curvature in absolute values should be between 0.5 cm and 5 cm, better between 0.8 cm and 4 cm, better between 1.0 cm and 3 cm, better between 1.3 cm and 2.5 cm, better between 1.4 cm and 2.0 cm.
  • the radius of curvature of the outer surface of the concave back plate should not be more than 40%, better not more than 30%, better not more than 20% of the average radius of curvature of the outer contour of the hollow profile differ and / or in the case of a tubular profile with a circular cross-section, the radius of curvature of the concave curvature deviates from the radius of curvature of the outer contour of the tubular profile by no more than 20%, preferably no more than 10%, preferably no more than 5%.
  • the distance between the two tear-off edges of a hollow profile is also important, because this is supposed to promote the formation of two adjacent vortex vortices without these hindering each other too much.
  • the distance should be between 30% and 60%, better between 35% and 55%, better between 40% and 50% of the greatest width of the outer contour of the hollow profile, in particular the outer diameter of the hollow profile designed as a round tube, measured in the transverse direction.
  • it can also be equal to or greater than the greatest width of the outer contour of the hollow profile, but preferably by no more than 10%, better no more than 20%, better no more than 30%.
  • the desired concave outer surface of the back plate is then created and the connecting areas between the outer edges of the segment strip inserted and the end edges of the remaining pipe cross-section can be designed as a blade-shaped tear-off edge, as described above.
  • the gap between the front and rear end of the segment strip inserted in reverse and the inner circumference of the pipe is naturally also tightly closed by a sealing part inserted tightly there, preferably welded in, or by a corresponding deformation of the segment strip at its front ends.
  • a sealing part inserted tightly there, preferably welded in, or by a corresponding deformation of the segment strip at its front ends.
  • Such a hollow profile is preferably formed in one piece.
  • the other leg has on its free end edge the tear-off edge for the flowing air, and this other leg forms an extension of the outer contour of the cross section of the front part towards the rear.
  • the outer contour of this leg lengthening the front part is preferably again concavely curved.
  • This angled control profile is preferably only in a region of the extent of the cross section of the first leg running along the back plate on the back plate, and can be pivoted with respect to this system by suitable means, such as an adjusting screw, whereby the angular position of the other Leg is pivoted and in particular the position of the tear-off edge formed thereon is changed to the front part.
  • the front part can have spaced apart in its direction of extension and protruding in the longitudinal direction, which protrude to the rear beyond the back plate and which engage in corresponding recesses of the control plate for its guidance in order to guide the control profile.
  • this object is achieved by placing the primary exhaust between the combustion chamber and an afterburning chamber Heating device is arranged, and the primary exhaust is designed as described above.
  • the primary vent preferably has a plurality of rows of hollow profiles that are spaced apart in the direction of flow and that are adjacent to one another transversely to the direction of flow, the rows being arranged in such a way that, viewed in the direction of flow, the hollow profiles of one row run transversely to the hollow profiles of the adjacent row of hollow profiles, i.e. viewed in the direction of flow Lattice made of hollow profiles becomes visible.
  • combustion chamber flap 22 In the front surface of the housing of the combustion chamber 20 there is a combustion chamber flap 22 which can be opened upwards, operated by a manual control 25, which in this case is coupled to a direct exhaust flap 16 in the ceiling of the combustion chamber 20, which is normally closed and only When the combustion chamber flap 22 is opened, the flue gases 14 can then be drawn off directly into the chimney 26 via the ceiling of the combustion chamber 20.
  • the flue gases 14 pull from the combustion chamber 20 through a primary exhaust 1 horizontally, preferably to the rear, into the afterburning chamber 21 and are thereby supplied with additional combustion air or via a recirculation path 15 from the combustion chamber 20 or over Recirculation openings 23 from the afterburning space 21 are mixed with recirculated flue gas in order to optimize the afterburning.
  • the primary vent 1 consists in this case of horizontally extending hollow profiles 2 arranged one above the other, between which there are clear passages 3 which narrow in the flow direction 10 and act as nozzle slots.
  • the flue gases post-burned in this way in the afterburning space 21 leave the heating device in the direction of the chimney 26, the chimney effect being able to be regulated by a regulating flap 18 arranged at the end of the afterburning space 21.
  • the rear wall is also designed as a heat exchanger 27 through which liquid flows, but this is irrelevant for the present invention.
  • the hollow profiles 2 consist of a V-shaped sheet metal, which forms a front tip and side walls projecting backward from this in the direction of flow 10, and one that is tightly inserted into the open rear side of this sheet, set back from its free ends, in particular welded back plate 5, which together offer a hollow interior. Secondary air and / or recirculation gas can be supplied via this hollow interior, which is then released via outlet openings 4 in the side walls of the hollow profiles 2 into the passages 3 and thus the flue gas 14 flowing through there.
  • the gas mixture flowing through the nozzle-like passages 3 behind the back plate 5 forms a reversing vortex 19 on each side of the hollow profile 2, whereby a good mixing of the flue gases 14 with the supplied secondary air and / or the recirculation gases is achieved from the hollow profiles 2 and thus leads to an improved afterburning in the afterburning chamber 21.
  • the outer surfaces 2a are spherically shaped from the widest point towards the rear up to the spoiler edge 7, which favor the reversal vortex, and as a result of which the free ends, that is to say the spoiler edges, approach one another.
  • the back plate is also curved so that it has a concave outer surface, that is to say the rear, even if it should not yet run up to the tear-off edge 7 without kinks.
  • the tear-off edges 7 are formed at an acute angle by sharpening the area of these free end edges.
  • the back plate 5 In this tightly welded state - the front openings at the end of the segment strip 29 inserted are tightly closed by a sealing part 32 against the subsequent complete circular cross-section of the pipe 2 - the back plate 5 then has a concave outer surface 5a, the radius of curvature of which corresponds to the radius of curvature of the inside of the pipe .
  • the tear-off edges 7 resulting from this assembly are usually obtuse-angled, but can be shaped at an acute angle by appropriate processing.
  • the distance 9 in the transverse direction 11 of the two tear-off edges 7 is approximately 70% of the width 28, that is to say the outer diameter, of the hollow profile 2 in this illustration.
  • the hollow profile 2 is designed symmetrically to the longitudinal center plane 10 ′, which runs centrally and vertically on the segment strip 29.
  • the outlet openings 4, which are preferably opposite one another with respect to this longitudinal center plane 10 ′, are set back somewhat in the direction of the back plate 5 from the widest point of the tubular profile 2 along the longitudinal center plane.
  • the design of the hollow profile 2 according to Figure 3b differs from that of the Figure 3a in that the segment strip 29 protrudes beyond its outer circumference at the point of contact with the tube 2, in that it has the same radius of curvature as the tube 2, but is a larger segment angle, i.e. not the segment separated from this tube 2, but from a segment other pipe with preferably the same outer and / or inner diameter and preferably the same wall thickness originates.
  • this segment strip 29 viewed in cross section, are acute-angled with an angle at the tip of preferably about 50 ° to 70 °, the outer flank being inclined such that its direction of inclination - viewed in the course of direction 2 '- is a tangent to the Represents the outer circumference of the tube 2, since it has been found that this promotes the formation of reversal eddies particularly well.
  • the ends of the segment strip 29 preferably do not protrude beyond the widest point of the cross section of the tube 2.
  • the design of the hollow profile according to Figure 3c differs from that of the Figure 3b in that the segment strip 29 inserted there into the recess of the tube 2 has a smaller radius of curvature, that is to say originates from a tube with a larger outer or inner diameter than the tube 2.
  • segment strip 29 with its ends preferably protrudes over the outer circumference of the tube 2 at the contact point and, in contrast to the ends, at Figure 3b - Preferably also over the widest point of the tube 2, that is, its diameter 28, on both sides.
  • the angle of the acute-angled cutting edge 7 is smaller here than in the design according to FIG Figure 3b , namely only about 40-50 °.
  • Figure 3d shows a design in which no segment strip of another, in particular round, pipe is inserted and in particular welded into the recess of the pipe 2, but an angle profile.
  • protrusion and the design of the lateral tear-off edges 7 can preferably be analogous to that in FIG Figures 3b and 3c be designed as described.
  • one end of the hollow profile 2 is closed at the front, while the end on the left in the figure is partially open at the front and forms an inlet opening 31.
  • Figure 5 shows a two-part design in cross section, only one part, the front part 2.1, being a hollow profile, in this case in one piece, the rear end of which in turn forms the back plate 5.
  • the hollow profile 2 is again laterally symmetrical to the longitudinal center plane 10 '.
  • the front part 2.1 is shown with a cross-sectional contour like the closed part of the A-shape in Figure 2 shown in the left half the front part 2.1 is shown approximately semicircular in cross section, each with a flat, that is to say straight, back plate 5.
  • one of the angled control profile parts 8a, b is in each case on the back plate 5, namely on the outer surface of the bend between its two legs 8a1, 8b1, the inclination of which relative to the back plate 5 by means of an adjusting screw 33 and a this leg 8a1, 8b1 can be adjusted away from the back plate 5 with a force-acting disc spring 30.
  • the adjusting screw 33 preferably extends through both of these legs 8a1, 8b1 and is screwed more or less strongly into a threaded hole in the back plate 5, which lies on the longitudinal center plane 10 '.
  • the other leg 8a2, 8b2 has a spherically curved outer surface, and at its free end a tear-off edge 7 that tapers to a point in cross-section. 8b2, preferably in such a way that the widest point of the entire profile in the flow direction 10 lies just behind the rear side of the back plate 5, that is to say in the area of the freely tapering legs 8a2, 8b2.
  • Figure 6a shows a primary passage sectioned in the longitudinal direction, the flow direction 10, in which the flow direction 10 of the flue gases 14 runs from bottom to top.
  • two rows 34a, b of hollow profiles 2 are arranged one behind the other in the flow direction 10 within the surrounding housing that carries the flue gases 14, the ends of which are in receiving bodies rest, via which the supply of the secondary air flowing out of the hollow profiles 2 also takes place at least on one side, in which case, for example, the one-piece design of the hollow profiles 2 according to FIG Figure 3 is chosen.
  • the hollow profiles 2 lie parallel at a distance from one another.
  • the direction of the hollow profiles of the one row 34a runs transversely, here at right angles, to the direction of the hollow profiles 2 of the other row 34b, so that viewed in the flow direction 10, as in FIG Figure 6b shown, results in a grid of hollow profiles 2 through which the smoke gases 14 must flow.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)

Claims (16)

  1. a) Dispositif de chauffage pour combustibles solides, comprenant une chambre de combustion (20) qui peut être reliée par un conduit primaire (1) à une chambre de postcombustion (21) dans laquelle les gaz de combustion (14) s'écoulant de la chambre de combustion (20) sont postcombustionnés, le conduit primaire (1) comprenant
    b) une pluralité de profils creux tubulaires (2) qui sont disposés à distance les uns des autres transversalement par rapport à leur direction d'extension (2'),
    c) dans lequel ledit au moins un passage libre (3) entre les profils creux (2) forme au moins une fente de buse pour les gaz de combustion (14) passant à travers dans la direction de l'écoulement (10),
    d) dans lequel les profils creux (2) présentent des ouvertures de sortie (4) par lesquelles l'air secondaire amené par l'intérieur du profil creux (2) et/ou les gaz de fumée recyclés s'écoulent dans les passages (3),
    caractérisé en ce que
    e) les surfaces extérieures (2a) du profil creux (2), en partant du point le plus large dans la direction de l'écoulement (10), se rapprochent du plan médian longitudinal (10') du profil creux (2) vers l'arrière, c'est-à-dire dans sa zone arrière (2a 2),
    f) les surfaces extérieures (2a) du profil creux (2) se terminent dans la direction de l'écoulement (10) par une arête de rupture respective (7), dont l'espacement peut également être supérieur à la plus grande largeur du contour extérieur du profil creux (2), et
    g) une plaque arrière (5) reliant les deux arêtes de rupture (7) et formant la partie arrière du profil creux (2) présente un contour extérieur concave (5a).
  2. Dispositif de chauffage selon la revendication 1,
    caractérisé en ce que
    les profils creux (2) sont symétriques par rapport à leur plan médian longitudinal (10') contenant la direction d'extension (2') du profil creux (2).
  3. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) les profils creux (2), vus dans la direction d'extension (2') des profils creux, présentent des surfaces extérieures (2a) qui s'éloignent les unes des autres dans la direction de l'écoulement (10) des gaz de combustion (14) de l'avant vers l'arrière, au moins dans la zone avant (2a 1) et/ou
    b) les ouvertures de sortie (4) sont disposées devant ou au plus tard au point le plus large du contour extérieur (2a) du profil creux (2) dans la direction de l'écoulement (10).
  4. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) l'extrémité libre arrière de l'arête de rupture (7) est formée comme une arête en forme de V, en particulier comme une arête de coupe, lorsqu'elle est vue en coupe transversale,
    b) en particulier avec un rayon d'arête, considéré dans la direction d'extension (2'), inférieur à 2 mm, mieux inférieur à 1 mm, mieux inférieur à 0,5 mm, mieux inférieur à 0,3 mm, mieux inférieur à 0,2 mm, et/ou
    c) l'arête de rupture (7) est formée comme une arête de coupe à angle aigu, dont l'angle de coupe est inférieur à 85°, mieux inférieur à 80°, mieux inférieur à 75°, mieux inférieur à 60°, mieux inférieur à 50°.
  5. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) la face arrière (5a) de la plaque arrière (5) se transforme en l'arête de rupture (7) formée comme arête de coupe sans épaulement et sans courbure avec un rayon de courbure qui est inférieur à 6 mm, mieux inférieur à 4 mm, mieux inférieur à 2 mm, et/ou
    b) la face arrière (5a) de la plaque arrière (5) présente une courbure concave, dont le rayon de courbure est notamment compris entre 0,5 cm et 5 cm, mieux entre 0,8 cm et 4 cm, mieux entre 1,0 cm et 3 cm, mieux entre 1,3 cm et 2,5 cm, mieux entre 1,4 cm et 2,0 cm.
  6. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    la face arrière (5a) de la plaque arrière (5) présente une courbure concave dont le rayon de courbure
    a) s'écarte en particulier de 40 % au maximum, de préférence de 30 % au maximum, de préférence de 20 % au maximum, du rayon de courbure moyen du contour extérieur de la section transversale du profil creux, dans le cas d'un profil tubulaire à section circulaire, s'écarte du rayon de courbure de la circonférence extérieure de ce profil tubulaire
    et/ou
    b) dans le cas d'un profil tubulaire ayant une section transversale annulaire circulaire, le rayon de courbure de la courbure concave s'écarte du rayon de courbure du contour extérieur du profil tubulaire de 20 % au maximum, de préférence de 10 % au maximum, de préférence de 5 % au maximum.
  7. Dispositif de chauffage selon l'une des revendications précédentes, caractérisé en ce que le profil creux (2) présente une ouverture d'entrée (31) d'air secondaire, notamment dans l'une de ses faces frontales.
  8. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) vues dans la direction d'extension (2'), les surfaces extérieures (2a) de la zone arrière (2a2) du profil creux (2) sont plates ou convexes avec une forme bombée, et/ou
    b) la distance (9) entre les deux arêtes de ruptures (7) d'un profil creux (2) est comprise entre 30 % et 60 %, mieux entre 35 % et 55 %, mieux entre 40 % et 50 %, de la plus grande largeur (28) du contour extérieur (2a) du profil creux (2) dans la direction transversale (11), en particulier du diamètre extérieur (28) du profil creux (2) formé comme un tube rond (2).
  9. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) le profil creux (2) est un tube (2) de section circulaire, à partir duquel est formée une bande de segments (29) s'étendant dans la direction d'extension (2')
    b) est fixé de manière étanche, en particulier soudé, au reste du tube (2) avec sa face intérieure précédente tournée vers l'extérieur.
  10. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) le profil creux (2) est un tube (2) de section circulaire, avec un évidement s'étendant dans la direction d'extension (2'),
    b) dans lequel une bande (29') avec une section transversale qui est incurvée lorsqu'elle est vue dans la direction d'extension (2') est fixée de manière étanche, en particulier soudée, avec son côté concave,
    c) en particulier une bande de segment (29') d'un autre tube de section transversale notamment circulaire et de diamètre différent, dont la face intérieure du tube précédent est tournée vers l'extérieur.
  11. Dispositif de chauffage selon la revendication 10,
    caractérisé en ce que
    a) les extrémités latérales de la bande (29') vues dans la direction d'extension (2') font saillie transversalement au-delà de l'évidement et notamment au-delà du point le plus large du tube (2) vue dans la direction de l'écoulement (10), mais de préférence 10 % au maximum, mieux 20 % au maximum, mieux 30 % au maximum de la largeur du tube (2) au point le plus large, et/ou
    b) le flanc extérieur de l'arête de rupture (7), qui est formé comme une arête de coupe à angle aigu, vu dans la direction d'extension (2'), représente avec son extension une tangente à la circonférence extérieure du profil creux (2) ou s'en écarte tangentiellement dans la direction de 10 % au maximum, mieux de 20 % au maximum, mieux de 30 % au maximum.
  12. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    l'espace entre l'extrémité avant et arrière de la bande de segments (29) dans la direction d'extension (2') et la circonférence intérieure du tube (2) est fermé de manière étanche.
  13. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    le profil creux (2) est réalisé en deux parties avec une partie avant (2.1) fermée en section transversale à l'exception des ouvertures de sortie (4) et un profile de commande (8) qui s'étend sur la face arrière de la plaque arrière (5) de la partie avant (2.1) dans la direction d'extension (2'), en particulier qui repose sur celle-ci, qui est fixée de manière amovible et qui présente l'arête de rupture (7) faisant saillie vers l'arrière et qui est réglable en particulier dans sa distance (9) par rapport à la partie avant (2.1).
  14. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) le profil de commande (8) est formé en deux parties et les deux parties (8a, b) du profil de commande (8) sont coudées et s'appuient chacune avec les surfaces extérieures d'une branche (8a1, 8b1) sur la face arrière de la plaque arrière (5), et la largeur (28) de l'extrémité arrière du profil de commande (8) et donc de la distance (9) entre les deux arêtes de rupture (7) est réglable par pivotement autour de cette ligne de contact, et/ou
    b) une vis de réglage réglable (33) presse une branche (8a1, 8b1) de chaque partie (8a, b) contre la face arrière (5a) de la plaque arrière (5), qui est sollicitée dans la direction opposée par un ressort, en particulier un ressort à disque (30).
  15. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) la partie avant (2.1) présente des ouvertures de passage d'air dans sa plaque arrière (5), et/ou
    b) la partie avant (2.1) présente des saillies (12) espacées dans la direction de l'écoulement (10) et faisant saillie vers l'arrière au-delà de la plaque arrière (5), lesquelles saillies s'engagent dans des évidements correspondants (13) du profil de commande (8) pour guider cette dernière.
  16. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé en ce que
    a) le conduit primaire (1) présente plusieurs rangées (34a, b) de profils creux (2) s'étendant de manière disproportionnée, en particulier parallèlement les uns aux autres, les uns derrière les autres dans la direction de l'écoulement (10), et
    b) en particulier les profils creux (2) d'une rangée (34a), vus dans la direction de l'écoulement (10), s'étendent transversalement aux profils creux (2) de la rangée (34b) qui précède ou suit immédiatement dans la direction de l'écoulement (10).
EP17206702.7A 2016-12-29 2017-12-12 Appareil de chauffage avec arrangement de buses pour postcombustion Active EP3343106B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202016107463.0U DE202016107463U1 (de) 2016-12-29 2016-12-29 Primärabzug mit Kehrwirbel-Freiraum
DE202017104509.9U DE202017104509U1 (de) 2016-12-29 2017-07-28 Primärabzug mit Kehrwirbel-Freiraum

Publications (2)

Publication Number Publication Date
EP3343106A1 EP3343106A1 (fr) 2018-07-04
EP3343106B1 true EP3343106B1 (fr) 2021-08-25

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Application Number Title Priority Date Filing Date
EP17206702.7A Active EP3343106B1 (fr) 2016-12-29 2017-12-12 Appareil de chauffage avec arrangement de buses pour postcombustion

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EP (1) EP3343106B1 (fr)
DE (2) DE202016107463U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017117097B4 (de) * 2017-07-28 2019-10-17 Heribert Posch Primärabzug für feste Brennstoffe sowie Heizvorrichtung mit diesem Primärabzug
WO2023206336A1 (fr) * 2022-04-29 2023-11-02 Haier Us Appliance Solutions, Inc. Systèmes de prévention de dommages à l'écoulement d'air inverse dans des appareils

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5342592A (en) * 1989-07-04 1994-08-30 Fuel Tech Europe Ltd. Lance-type injection apparatus for introducing chemical agents into flue gases
DE4435749C2 (de) * 1994-10-06 1998-05-28 Heribert Posch Heizvorrichtung für feste Brennstoffe
DE19620264C1 (de) * 1996-05-20 1997-09-18 Heribert Posch Feuerraumboden
FR2937888B1 (fr) * 2008-10-31 2011-08-19 Solvay Dispositif et procede pour distribuer un fluide.
DE102011117950B4 (de) * 2011-11-08 2014-09-25 Heribert Posch Primärabzug für eine Heizvorrichtung für feste Brennstoffe sowie ein Verfahren zum Erstellen eines Primärabzugs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Publication number Publication date
DE202016107463U1 (de) 2017-01-19
DE202017104509U1 (de) 2018-04-03
EP3343106A1 (fr) 2018-07-04

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