EP1912021A1 - Chambre de combustion pourvue d'un brûleur - Google Patents

Chambre de combustion pourvue d'un brûleur Download PDF

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Publication number
EP1912021A1
EP1912021A1 EP07101283A EP07101283A EP1912021A1 EP 1912021 A1 EP1912021 A1 EP 1912021A1 EP 07101283 A EP07101283 A EP 07101283A EP 07101283 A EP07101283 A EP 07101283A EP 1912021 A1 EP1912021 A1 EP 1912021A1
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EP
European Patent Office
Prior art keywords
combustion chamber
section
tubular extension
cross
sound
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Granted
Application number
EP07101283A
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German (de)
English (en)
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EP1912021B1 (fr
Inventor
Jakob Hermann
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Individual
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Individual
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Publication of EP1912021A1 publication Critical patent/EP1912021A1/fr
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Publication of EP1912021B1 publication Critical patent/EP1912021B1/fr
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    • 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
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
    • F23M20/005—Noise absorbing means

Definitions

  • the present invention relates to a burner provided with a combustion chamber according to the preamble of the independent claim.
  • a combustion chamber is well known in the form of heaters. Often occur on them thermoacoustic vibrations or self-excited combustion oscillations, which must be avoided, which is thus an object of the present invention.
  • the invention can be used for all the different combustion chambers or types of heaters - so manufacturer and design-independent.
  • the achievable by the invention effect is in a significantly quiet work of appropriately designed combustion systems, heaters or firing equipment such.
  • process gas heater convection heater, room heater, domestic water heater, circulating water heater with and without hot water, directly heated storage and even boiler with and without Saugzug- or pressure fan and chemical process gas heater and drive systems, so that these devices without unreasonable noise levels for the site, such.
  • work living or basement rooms or other locations, can be put into operation.
  • an extension is mounted or plugged according to the invention to the wall of the heater or the combustion chamber.
  • the invention works best in tubular systems.
  • a gas or oil fired combustion system with a combustion chamber or heater 18 has on one side of its housing 24 an inlet 19 for air from the atmosphere or oxidant from any source and on the other side an exhaust gas outlet 20.
  • the fuel-air mixture formed in the mixture formation section 9 is supplied via a blower 10 and a connecting section 11 to a tumble burner 12, which may be in the form of a burner plate, for example, and is burned there in the combustion chamber 13 of the heating device 18.
  • FIG. 1 shows, by way of example, a combustion system or heater 18 with a burner 12 burning from top to bottom.
  • the invention can be used in a combustion system or heater with a burner 12 burning in any direction.
  • the combustion chamber 13 is followed by a heat exchanger 14, via which the heat energy generated by the flame 35 can be transferred to a medium, for example water, and made available to a heating circuit, for example in a residential building.
  • a condensate tray 15 or an exhaust gas deflector 15 is provided on the housing 24 of the heater 18.
  • a condensate tray is needed on a condensing boiler where the exhaust gases of the burner are cooled below the condensation point when passing through the heat exchanger, an exhaust gas diversion on all other units.
  • the situation is different when a wedge-shaped extension 7, which is filled with a sound-absorbing or similar sound-damping material 2, is introduced into the tubular extension 22.
  • the cross-sectional shape (perpendicular to the drawing plane) of the wedge-shaped extension 7 can be arbitrary, For example, semicircular, square, rectangular, triangular, semi-oval, etc. It is only essential that the extension 7, if possible starting with a step 25, unilaterally reduces the cross-section of the tubular extension 22 in the direction of the outlet 26, ie in the flow direction 34.
  • extension 6 of the wedge-shaped extension 7 proved more or less constant cross-section, which should also be filled with sound-absorbing material 3 and which is upstream of the stage 25, so this forms at the beginning.
  • the cross section of the extension 6 can also be designed arbitrarily, but should suitably correspond in the shape of the extension 7. Instead of a step 25, another transition from the wide end of the wedge in the direction of the inlet 21 can take place.
  • a further improvement of the effect of the tubular extension 22 can be further achieved by a suitable design of the remaining of the combustion air flowed through the free area.
  • a continuous reduction in cross-section of the flow-through cross-sectional area 27 (perpendicular to the plane of the drawing plane) from the outlet 26 in the direction of the new inlet 21, ie opposite to the flow direction 34.
  • Which form the free flow cross-section 27 in detail along the tubular extension 22 occupies is not relevant.
  • the cross-sectional area may be e.g. also from a round shape into an oval, rectangular, triangular or other shape over the length of the tubular extension 22 to convert. Interruptions of the continuous reduction in cross section are possible, but should remain below 50% of the total length of the tubular extension 22 in their length.
  • FIG. 3 shows a slightly bulbous transitional shape. Not hindering but even conducive to the invention, it is when the new inlet port 21, as shown in Figure 4, a trumpet-shaped or otherwise designed extension 36 which extends counter to the flow direction 34. However, the length 37 of the extension 36 should occupy less than 25% of the total length 38 of the tubular extension 22.
  • the extension 36 is essentially the easier suction of air into the heater 18th
  • the wedge-shaped enlargement 7 shown in FIGS. 1 to 4 can not only be attached on one side, but, as shown in FIG. 5, on two opposite sides, on several sides with interruptions or even circumferentially with a cylindrical but also differently shaped tube opening or cross-sectional area 27 in the FIG Central axis 28 of the tubular extension 22, through which the combustion air is sucked, executed.
  • the length 32 of the wedge-shaped extension 7 should be at least five times the root of the smallest free and air-flow cross-sectional area 27 of the tubular extension 22.
  • the wall of the extension 7 should preferably be made of dimensionally stable plastic. However, it is also possible a version made of metal or similar material.
  • the extension 7 In order to achieve the full damping effect on the thermoacoustic oscillations, the extension 7 must be mounted as close to the mixture formation section 9, that is to be arranged as close to the inlet 19 of the fuel assembly 9. Further, the length 33 of the pipe section 1 of the tubular extension 22 should be made greater than the length 31 of the pipe section 5, which corresponds to the distance between the end of the wedge-shaped extension 7 and the inlet 19 of the fuel assembly 9. The pipe section 5 can even be completely eliminated.
  • the length 33 of the tube section 1 of the tubular extension 22 should, if possible, be at least as long as the length 32 of the wedge-shaped extension 7.
  • the length 32 of the wedge-shaped extension 7 should at least 5 times the root of the smallest free and air flow cross-sectional area 27 of tubular extension 22 amount.
  • Figure 6 shows a variant of the embodiment of Figure 1.
  • the tubular extension 22 is designed as a deflection 4, which opens in the flow direction in the extension 7.
  • the entire arrangement can here be made of a single part, for example, a rectangular box perpendicular to the plane, in which a separating web 23 is introduced and in the inlet 21 air is sucked, which is transported by a rectangular cross-section, through the deflection 4 flows and then flows again in a rectangular cross-section filled with sound-absorbing or sound-damping material 2 and 3 expansion 6 and 7, then to flow into the mixture formation section 9.
  • the divider 23 is angled accordingly installed in the tubular extension 22. As a result, sound vibrations are ideally avoided.
  • To improve the inflow of the inlet 21 may be provided with a half-trumpet-shaped extension 36.
  • FIG. 7 shows a further exemplary embodiment.
  • the extension 6 filled with sound-absorbing or sound-damping material 3 is pulled over the deflection 4 in the direction of the inlet 21, whereby a further improvement of the vibration damping is achieved.
  • the tubular extension 22 does not necessarily have to be straight, that is to say designed as a cylindrical tube. This can rather be designed as a manifold, spiral or the like and thus assume any shape. The same applies to the filled with sound-absorbing or sound-absorbing material 2 extension 7. This can also be incorporated into a manifold, spiral, helical or other arcuate structure. It is only necessary to ensure that the filled with sound-absorbing or sound-absorbing material wedge-shaped extension in the flow direction of the air, ie in the direction of the mixture formation section 9 decreases in cross-section.
  • the change in cross section of the wedge-shaped extension does not have to be continuous, that is to say, sections with a constant cross section or even small enlargements may occur, provided these do not nullify the wedge-shaped character as a whole. Also possible is a wedge with a blunt tip, while the wedge character must be preserved.
  • the free air-flowed cross-section 27 of the tubular extension 22 should always apply that this tapers in the direction of the inlet 21 and the cross-section decreases.
  • the smallest cross section of the tubular extension 22 should be as close as possible to the inlet 21 and max. only 75% of the cross section at the outlet 26 amount. It is not hindering for the invention if the free air flow cross section of the tubular extension 22 at the outlet 26 is greater than the free air flow cross section at the old inlet 19 of the heater 18. It is also not cumbersome if the decrease in the free air-flow cross-section 27 from the outlet 26 in the direction of the inlet 21 of the tubular extension 22 is not continuous, but is more or less interrupted. It is only important that at least 50% of the total length 38 of the tubular extension 22 has a directed against the flow direction 34 continuous or stepped decrease in the free air flow cross-section 27 in the whole.
  • Figure 8 shows a further variant as a 3D section, as they would be practicable.
  • the constant cross section of the tubular extension 22 and the separating web 23 can be seen very well.
  • Figure 9 shows an embodiment in which individual wedge-shaped extensions 7 are pneumatically connected in series and connected between the extensions line sections with a constant cross-section.
  • the fuel air mixture can consist of both gas (natural gas or LPG) or oil mist (small droplets) in conjunction with air.
  • the heater can also be operated with solid or dusty fuel.
  • the filled with sound-absorbing or sound-absorbing material 2, 3 wedge-shaped extension 7 and extension 6 is designed so that the cross section of passing them or passing through them air line is not affected.
  • the tubular extension (22) may at least partially be formed by an outer wall of the heater or by a housing partially enclosing the combustion chamber.
  • number description 1 Pipe section in front of the wedge 2 acoustic damping material 3 acoustic damping material 4 redirection 5 Pipe after the damping wedge 6 renewal 7 wedge-shaped extension 8th
  • Fuel supply device 9 Mixture formation section or fuel fitting 10 fan 11 access link 12 burner 13 combustion chamber 14 heat exchangers 15 Condensate tray or exhaust diverter 16 condensate drain 17 exhaust system 18 Combustion system or heater 19 Air supply or oxidation or even inlet 20 Exhaust outlet or jointlynauslrawö réelle 21 new intake for air 22 Pipe-like extension 23 divider 24 casing 25 step 26
  • Outlet of the tubular extension 22nd 27 Air flow cross section of the extension 22 28
  • Central axis of the tubular extension 22nd 29 not used 30 not used 31 Length of pipe 5 32 Length of the wedge 7 33 Length of pipe 1 34 flow direction 35 flame 36 Trumpet-shaped or
EP07101283A 2006-10-06 2007-01-26 Chambre de combustion pourvue d'un brûleur Not-in-force EP1912021B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006047386 2006-10-06

Publications (2)

Publication Number Publication Date
EP1912021A1 true EP1912021A1 (fr) 2008-04-16
EP1912021B1 EP1912021B1 (fr) 2013-03-13

Family

ID=37882320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07101283A Not-in-force EP1912021B1 (fr) 2006-10-06 2007-01-26 Chambre de combustion pourvue d'un brûleur

Country Status (1)

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EP (1) EP1912021B1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896192A2 (fr) 1997-08-05 1999-02-10 Karl Dungs GmbH & Co. Dispositif d'admission du gaz combustible pour un brûleur à prémélange
AT408028B (de) * 1998-07-30 2001-08-27 Vaillant Gmbh Heizeinrichtung
WO2002029319A1 (fr) 2000-10-03 2002-04-11 Sit La Precisa S.P.A. Melangeur air-gaz ameliore
DE10202702A1 (de) 2001-01-24 2002-09-19 Ifta Ingenieurbuero Fuer Therm Heizgerät mit einem Gehäuse
DE102004006647A1 (de) 2003-02-14 2004-08-26 IfTA Ingenieurbüro für Thermoakustik GmbH Verfahren und Vorrichtung zum Ableiten von Abgas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896192A2 (fr) 1997-08-05 1999-02-10 Karl Dungs GmbH & Co. Dispositif d'admission du gaz combustible pour un brûleur à prémélange
AT408028B (de) * 1998-07-30 2001-08-27 Vaillant Gmbh Heizeinrichtung
WO2002029319A1 (fr) 2000-10-03 2002-04-11 Sit La Precisa S.P.A. Melangeur air-gaz ameliore
DE10202702A1 (de) 2001-01-24 2002-09-19 Ifta Ingenieurbuero Fuer Therm Heizgerät mit einem Gehäuse
DE102004006647A1 (de) 2003-02-14 2004-08-26 IfTA Ingenieurbüro für Thermoakustik GmbH Verfahren und Vorrichtung zum Ableiten von Abgas

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EP1912021B1 (fr) 2013-03-13

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