EP3343106A1 - Déclencheur primaire pourvu d'espace à écoulement tourbillonnaire inversé - Google Patents

Déclencheur primaire pourvu d'espace à écoulement tourbillonnaire inversé Download PDF

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Publication number
EP3343106A1
EP3343106A1 EP17206702.7A EP17206702A EP3343106A1 EP 3343106 A1 EP3343106 A1 EP 3343106A1 EP 17206702 A EP17206702 A EP 17206702A EP 3343106 A1 EP3343106 A1 EP 3343106A1
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EP
European Patent Office
Prior art keywords
hollow
better
primary
section
profile
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
EP17206702.7A
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German (de)
English (en)
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EP3343106B1 (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 solid fuel heater such as wood, and more particularly to the primary exhaust of the flue gases from the primary combustion chamber to a downstream afterburner.
  • the primary train often consists of a kind of rust - even if it is vertical, since the flow direction in the primary train runs horizontally - from adjacent juxtaposed hollow sections, through the interior of the secondary air is supplied and discharged through outlet openings in the passages between the hollow sections.
  • These passages are Favor by the increasing in the flow direction cross sections of the hollow bodies narrowing passages and act as a nozzle, so that the acceleration of the flue gases sucking in the secondary air without additional fan or the like automatically sucks into the flue gas stream.
  • the flow rate must not exceed a certain limit, otherwise the flame passing through the primary exhaust tearing off the flame, and thus the combustion in the afterburner is first interrupted, usually a short time later by deflagration is set in motion, what to avoid applies.
  • This extension causes a sweeping vortex of the flowing gas mixture to be established on the rear side of the hollow profile near the projections.
  • the laminar gases flowing through the nozzle arrangement are thereby swirled, so that in this case a particularly good mixing of the gas components, ie the flue gases with the secondary air, occurs, which improves the completeness of the afterburning.
  • a generic primary extraction of a solid fuel heater has a plurality of hollow profiles which are spaced from one another transversely to their directions, which are preferably parallel to one another.
  • the flue gases pass through, wherein they are accelerated because the clear passage between the adjacent hollow sections represents a narrowing of the previous total flow cross-section and these clear passages act as nozzle slots.
  • the flue gases secondary air or recirculated flue gas is added, which are introduced into the hollow sections, and discharged through outlet openings, which are arranged in the circumference of the hollow profile, preferably at the location of the nozzle slot, so the clear passage to the flowing flue gases.
  • the object is achieved by approaching the outer surfaces of the hollow profiles of the flow in the direction of flow in which the flue gases flow through the passage, widest point of the hollow profiles towards each other towards the rear, thus approaching the longitudinal center plane of the hollow profile extending in the flow direction and each end in a spoiler edge.
  • the two Abrisskanten in the transverse direction may have a smaller, equal or greater distance than the largest width of the outer periphery of the hollow profile.
  • the back plate which connects the two tear-off edges and forms the rear part of the hollow profile, which as a rule is in one piece, has a concave outer contour.
  • the hollow profiles are formed symmetrically to their longitudinal center plane, which includes the extension direction. If the hollow sections are installed in a primary pullout, the flow direction of the flue gases flowing through the primary pullout is in or parallel to this longitudinal center plane.
  • It can be determined by the variation of the distance and / or the shape of the two separation edges from each other, and in particular the size of the lateral projection over the widest point of the hollow profile, the type of turbulence and the expression of the forming Kehrwirbel.
  • the supply of secondary air or recirculated flue gases in the hollow sections is preferably carried out via one of the end faces in the hollow profile.
  • the other end face is of course then tightly closed, so that the hollow sections have only one inlet opening for the secondary air and the outlet openings, usually a plurality of in the extension direction of the hollow profile on both sides arranged in the side surfaces outlet openings.
  • these outlet openings are preferably arranged before or at the latest at the widest point of the outer contour.
  • the shaping of the trailing edge is of great importance:
  • this is V-shaped in cross-section, thus forming a kind of cutting edge in which the edge radius considered in the direction of the hollow profile and therefore also the trailing edge is less than 2 mm is better than less than 1 mm, better less than 0.5 mm, better less than 0.3 mm, better less than 0.2 mm.
  • the cutting angle ie the angle of the V-shaped trailing edge viewed in cross-section, should be acute, preferably less than 85 °, more preferably less than 80 °, better less than 75 °, better still less than 35 °, better still less than 30 °.
  • the back so the outer surface of the back plate passes into this designed as a cutting edge and the outer contour without paragraph and no kink, which is already understood as a kink, if there is a transition with a radius of curvature, ie Knick radius, of more than 2 mm, even more than 4 mm, especially with more than 6 mm, there.
  • a radius of curvature ie Knick radius
  • the radius of curvature of the outer surface of the concave back plate should not exceed 40%, better still not more than 30%, better not more than 20% of the average radius of curvature of the outer contour of the hollow profile deviate and / or deviates in a tubular profile with circular cross-section of the radius of curvature of the concave curvature of the radius of curvature of the outer contour of the tubular profile by not more than 20%, preferably not more than 10%, preferably not more than 5%.
  • the distance between the two trailing edges of a hollow profile is important, because this is to encourage the formation of two adjacent sweeping vortices, without these interfering with each other too much.
  • the greatest width of the outer contour of the hollow profile may also be equal to or greater than the greatest width of the outer contour of the hollow profile, but preferably by not more than 10%, better still not more than 20%, better not more than 30%.
  • a hollow profile at least in its relevant for the mixing of gases mean length range - at the ends of the hollow sections is usually a support to a surrounding structure - produce, it is - in particular, if the hollow profile has a circular cross-section - a to be separated in the direction of the hollow profile extending segment strip of the hollow profile out of this, and with its inside out again in the resulting recess to re-use, and in particular to tightly fasten, preferably to be welded.
  • the desired concave outer surface of the back plate is thereby created and the connecting portions between the outer edges of the inserted segment strip and the end edges of the remaining pipe cross-section can be formed as described above as a blade-shaped trailing edge.
  • the gap between the front and rear ends of the reversed segment strip and the inner circumference of the pipe course, also tightly closed by a tightly inserted there, preferably welded, sealing part, or by a corresponding deformation of the segment strip at the front ends.
  • a tightly inserted there preferably welded, sealing part, or by a corresponding deformation of the segment strip at the front ends.
  • such a hollow profile is integrally formed.
  • the other leg has at its free end edge on the spoiler for the flowing air, and this other leg forms an extension of the outer contour of the cross section of the front part to the rear.
  • the outer contour of this leg extending the front part is preferably in turn concavely curved.
  • This angled control profile is preferably located only in a region of the extension of the cross section of the first, running along the back plate leg on the back plate, and can be pivoted by suitable means, such as a set screw relative to this system, 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 in its extension direction spaced and have protruding projections in the longitudinal direction, which protrude backwards beyond the back plate, and engage in corresponding recesses of the control plate for the guidance to guide the control profile.
  • this object is achieved by the primary extraction between the combustion chamber and a Nachbrennraum this Heating device is arranged, and the primary pullout is configured as described above one.
  • the primary train has a plurality of rows of flow paths adjacent to each other in the flow direction, wherein the rows are arranged so that viewed in the flow direction, the hollow profiles of one row transverse to the hollow profiles of the adjacent series of hollow profiles, ie viewed in the flow direction Grid made of hollow profiles is 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 raised upwards, actuated 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, it is also open to allow the flue gases 14 to be drawn off directly into the chimney 26 via the ceiling of the combustion chamber 20.
  • the primary pullout 1 consists of superposed in this case, horizontally extending, hollow sections 2, between which light passages 3 are present, which narrow in the flow direction 10 and act as nozzle slots.
  • the flue gases afterburned in this way in the afterburning space 21 leave the heating device in the direction of the chimney 26, wherein the chimney effect can be regulated by a regulation flap 18 arranged at the end of the afterburning space 21.
  • the rear wall is further formed as a liquid-flowed heat exchanger 27, which is irrelevant to the present invention.
  • the hollow sections 2 consist of a V-shaped bent sheet which forms a front tip and from this in the flow direction 10 projecting rear side walls, and one in the open back of this sheet, set back from its free ends, tightly inserted, in particular welded-in, back plate 5, which together provide a hollow interior. Secondary air and / or recirculation gas can be supplied via this hollow interior, which is then discharged via outlet openings 4 in the side walls of the hollow sections 2 into the passages 3 and thus the flue gas 14 flowing therethrough.
  • the gas mixture flowing through the nozzle-like passages 3 behind the back plate 5 on each side of the hollow section 2 a sweeping vortex 19, whereby a good mixing of the flue gases 14 with the supplied secondary air and / or the recirculation gases is achieved from the hollow sections 2 and thus leads to an improved afterburning in the afterburner 21.
  • outer surfaces 2a are spherically shaped from the widest point to the rear to the trailing edge 7, which favor the sweeping vortex, and as a result of which the free ends, that is to say the trailing edges, approach one another.
  • the back plate is bent so that it has a concave outer surface, ie back, even if they should not run without kinking to the trailing edge 7.
  • the demolition edges 7 are formed at an acute angle by sharpening the area of these free end edges.
  • the back plate 5 has a concave outer surface 5a whose radius of curvature corresponds to the radius of curvature of the pipe inside ,
  • tear-off edges 7 are usually obtuse, but can be formed acute angle by appropriate processing.
  • the distance 9 in the transverse direction 11 of the two tear-off edges 7 is about 70% of the width 28, ie the outer diameter of the hollow section 2 in this illustration.
  • the hollow profile 2 is formed symmetrically to the longitudinal center plane 10 ', which extends centrally and vertically standing on the segment strip 29.
  • the design of the hollow section 2 according to FIG. 3b is different from the one of FIG. 3a in that the segment strip 29 projects at the point of contact with the tube 2 over its outer circumference by having the same radius of curvature as the tube 2, but a larger segment angle, that is not the segment separated from this tube 2, but from one segment other tube with preferably the same outer and / or inner diameter and preferably the same wall thickness comes.
  • this segment strip 29 are viewed in cross-section at an acute angle with an angle at the top of preferably about 50 ° to 70 °, wherein the outer edge has a tendency such that their inclination direction - viewed in the direction 2 '- a tangent to the Outside circumference of the tube 2 represents, as has been found that this promotes the formation of sweeping vortex particularly well.
  • the ends of the segment strip 29 are preferably not over the widest point of the cross section of the tube 2 before.
  • the design of the hollow profile according to Figure 3c is different from the one of FIG. 3b in that the segment strip 29 used there in the recess of the tube 2 has a smaller radius of curvature, that is to say from a tube with a larger outer or inner diameter than the tube 2.
  • segment strip 29 with its ends preferably over the outer circumference of the tube 2 at the contact point before and - in contrast to the ends at FIG. 3b - Preferably over the widest point of the tube 2, so the diameter 28, on both sides before.
  • the outer edge of the tear-off edge 7 formed as a sharp edge in its extension represents a tangent to the outer circumference of the tube 2, the angle of the acute-angled cutting edge 7 is lower here than in the design according to FIG. 3b only about 40-50 °.
  • FIG. 5 shows in cross section a two-part design, with only the one part, the front part 2.1, a hollow profile, in this case in one piece, whose rear end in turn forms the back plate 5.
  • the front part 2.1 with a cross-sectional contour is like the closed part of the A-shape in FIG. 2 shown in the left half the front part 2.1 is approximately semicircular in cross section, each with a flat, ie straight, back plate. 5
  • the adjusting screw 33 preferably extends through both of these legs 8a1, 8b1 and is screwed in a threaded hole in the back plate 5, which lies on the longitudinal center plane 10 ', more or less strongly.
  • the other leg 8a2, 8b2 has a convex outer surface, and at its free end a tapered cross-section tear-off edge 7.
  • the outer surface of the front part 2.1 is preferably flush in the outer surface of this second, freely in the trailing edge 7 expiring, leg 8a2, 8b2 over, preferably so that the widest point of the entire profile in the flow direction 10 is located just behind the back of the back plate 5, ie in the region of the freely extending legs 8a2, 8b2.
  • FIG. 6a shows a primary passage in the longitudinal direction, the flow direction 10, in which the flow direction 10 of the flue gases 14 extends from bottom to top.
  • the hollow profiles 2 are parallel to each other at a distance.
  • the course direction of the hollow profiles of one row 34a extends transversely, in this case at right angles, to the course direction of the hollow profiles 2 of the other row 34b, so that viewed in the flow direction 10, as in FIG. 6b represented, a grid of hollow sections 2 results, which must be traversed by the flue gases 14.

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

Family

ID=58010849

Family Applications (1)

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 (1)

* 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

Citations (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
EP0706010A2 (fr) * 1994-10-06 1996-04-10 Heribert Posch Appareil de chauffage avec arrangement de buses
EP0809077A2 (fr) * 1996-05-20 1997-11-26 Heribert Posch Sol pour foyer
US20140246522A1 (en) * 2008-10-31 2014-09-04 Solvay Sa Device and process for distributing a fluid
DE102011117950B4 (de) * 2011-11-08 2014-09-25 Heribert Posch Primärabzug für eine Heizvorrichtung für feste Brennstoffe sowie ein Verfahren zum Erstellen eines Primärabzugs

Patent Citations (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
EP0706010A2 (fr) * 1994-10-06 1996-04-10 Heribert Posch Appareil de chauffage avec arrangement de buses
EP0809077A2 (fr) * 1996-05-20 1997-11-26 Heribert Posch Sol pour foyer
US20140246522A1 (en) * 2008-10-31 2014-09-04 Solvay Sa Device and process for distributing a fluid
DE102011117950B4 (de) * 2011-11-08 2014-09-25 Heribert Posch Primärabzug für eine Heizvorrichtung für feste Brennstoffe sowie ein Verfahren zum Erstellen eines Primärabzugs

Also Published As

Publication number Publication date
DE202017104509U1 (de) 2018-04-03
DE202016107463U1 (de) 2017-01-19
EP3343106B1 (fr) 2021-08-25

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