EP0350452B1 - Feuerungssystem mit Luft-Abgas-Schornstein - Google Patents

Feuerungssystem mit Luft-Abgas-Schornstein Download PDF

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Publication number
EP0350452B1
EP0350452B1 EP89810503A EP89810503A EP0350452B1 EP 0350452 B1 EP0350452 B1 EP 0350452B1 EP 89810503 A EP89810503 A EP 89810503A EP 89810503 A EP89810503 A EP 89810503A EP 0350452 B1 EP0350452 B1 EP 0350452B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
chimney
air
air intake
firing system
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.)
Expired - Lifetime
Application number
EP89810503A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0350452A3 (de
EP0350452A2 (de
Inventor
Gert Basten
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.)
PVA-PATENTVERWERTUNGSGESELLSCHAFT
Original Assignee
PVA-Patentverwertungsgesellschaft
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Publication date
Application filed by PVA-Patentverwertungsgesellschaft filed Critical PVA-Patentverwertungsgesellschaft
Publication of EP0350452A2 publication Critical patent/EP0350452A2/de
Publication of EP0350452A3 publication Critical patent/EP0350452A3/de
Application granted granted Critical
Publication of EP0350452B1 publication Critical patent/EP0350452B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F23L3/00—Arrangements of valves or dampers before the fire
    • 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
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/04—Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F23J2211/101—Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement

Definitions

  • the present invention relates to a combustion system with an air-exhaust chimney and an associated combustion system.
  • the combustion system can e.g. a central heating system, a single fireplace or an open fireplace (chimney).
  • LAS chimneys are chimneys in which a supply air duct runs parallel to the flue gas duct.
  • the exhaust gas outlet and supply air inlet openings are locally separated from each other at the chimney top, so that, as a rule, only small pressure differences occur between these two openings in the wind. This reduces the risk of backflows, as is occasionally the case when the air inlet and outlet openings are further separated.
  • the small distance between these two openings in the LAS system harbors the risk of recirculation, ie there is the major disadvantage that, above all in the event of wind or exhaust gas entering the intake air. Depending on the influence of the wind, this can significantly impair the combustion process.
  • a chimney cap is known from WO-A-8606818, which projects beyond an exhaust gas outlet opening of the chimney in the axial direction, and surrounds this exhaust gas outlet opening in the axial direction, viewed from the side, at a distance, in order to deflect the exhaust gases in the vertical direction upward without deflection.
  • a firing system in which, in order to increase the boiler efficiency and to largely eliminate atmospheric influences, the supply air is sucked in by means of at least one blower and the exhaust gases with this blower with an overpressure via the exhaust gas duct which substantially exceeds the atmospheric pressure is expelled.
  • the latter is provided with thermal insulation over at least part of its length. Since, if there are any cracks in the exhaust duct, the excess pressure in them could cause toxic exhaust gas to escape into living areas, the exhaust duct is surrounded by the air intake duct for safety reasons, so that any exhaust gas escaping laterally from the exhaust duct under excess pressure would be diluted via the air extraction duct and extracted again. Due to the blower that is mandatory with this system, this system is also expensive to purchase and operate.
  • the object of the present invention is to provide a combustion system with an LAS chimney, in which recirculation of the exhaust gases is avoided in a simple manner and without increasing the operating costs, even at extreme wind conditions, or at least reduced to an acceptable level.
  • a regulating member regulating the air intake volume flow is arranged in the air intake duct, and the latter for regulating it with at least one in the exhaust gas duct and / or air intake duct arranged exhaust gas or supply air sensor is connected.
  • the at least one sensor can be designed, for example, to be responsive to the parameters prevailing in the exhaust gas flow, such as pressure and / or temperature and / or lambda number and / or flow velocity. The actual value determined is then compared in a comparison circuit with the corresponding target values and any difference for controlling this regulating member is evaluated.
  • the exhaust gas outlet opening is dimensioned such that the exhaust gas outlet speed during operation of the combustion system is at least 1.9 m / s.
  • the flow guide elements of the chimney cap are arranged at least approximately in at least one round and / or polygonal, preferably octagonal pyramid frustum and / or prism surface, and these flow guide surfaces are preferably at least partially provided with throughflow openings.
  • Chimney hats or flow guide elements of this type are known, for example, from AT-PS 375 455, CH-PS 350 063, PCT publication WO 86/06818, EP-A-0 293 332 or CH-PS 674 047.
  • the chimney extension 3 a so-called chimney extension, which is so-called thin-walled and made of sheet metal and stabilizes the outflow conditions in the most varied of wind inflow conditions, in the case of the chimney firing system 2 connected to a firing system with a LAS chimney Exhaust outlet opening 4, which is surrounded laterally and at a distance by a distance D, which in the present case is 200 mm, is arranged above a plurality of air intake openings 6 covered by a flow separating plate 5. Furthermore, the exhaust gas outlet opening 4 or the chimney is designed and dimensioned such that the exhaust gas outlet speed V is at least 1.4 m / s.
  • the air intake openings 6 can be adjusted with respect to the size of their opening cross section, or the entire air intake part 7 can be adjusted slightly downwards along the outer tube 8, so that below the flow separating plate 5 between the underside thereof and the upper edge of the annularly shaped air intake part 7 additionally an annular suction gap 9 (dash-dotted) is formed.
  • the air intake duct 11 thermally insulated from the exhaust duct 13 by means of an insulation layer 12.
  • the flow separating plate 5 projects beyond the air intake openings 6 in the horizontal direction by at least 20 mm.
  • a regulating member 14 which can regulate the flow of the air intake volumetric flow, is arranged in the lower end region of the air intake duct 11, which can be in the form of an iris diaphragm, a slide valve and / or a blower, for example .
  • at least one exhaust gas sensor 15 is arranged in the exhaust gas duct 13, which sensor is used to determine exhaust gas parameters of interest in the exhaust gas flow, such as pressure and / or temperature and / or lambda number and / or flow velocity and / or the chimney temperature is formed.
  • the actual values determined in this way are compared in a comparison and evaluation circuit connected to the sensors 15 and 16 with the target values required for an optimal combustion process, and any differences for controlling the regulating member 14 are evaluated.
  • the firing surface 17 of the fireplace 2 is chamber-shaped and this chamber 18 is connected to the lower end of the air intake duct 11.
  • the top of this chamber 18, i.e. the firing surface 17 of the fireplace 2 is provided with air outlet openings 19, via which the supply air regulated via the LAS chimney 1 is supplied to the fireplace.
  • the tubular through openings 20 provided in the chamber 18 and closable at their upper ends serve to discharge the ashes accumulating on the firing surface 17 into a dustproof ash container 21 which can be moved and removed below the chamber 18.
  • the comparison and evaluation circuit connected to the sensors 15 and 16 can also be designed to be programmable such that the regulating member 14 is regulated according to a different law when the fireplace 2 is started up than after the normal operating temperature has been reached.
  • curves represent measured recirculation values, curve A showing the exhaust gas recirculation behavior with an arrangement according to FIG. 1, but without the thin-walled chimney extension 3 and curve B showing the exhaust gas recirculation behavior with an arrangement according to FIG. 1, these curves representing measured values .
  • the thin-walled chimney extension 3 was designed in accordance with PCT publication WO 86/06818, i.e. a chimney cap of the type Basten-Regulator-Extra from Inventina AG., Landquart (Switzerland) was used.
  • the exhaust gas recirculation can be drastically reduced so far completely unexpectedly for the person skilled in the art when using the arrangement designed according to the invention, as is clearly and unambiguously evident with the aid of curve B.
  • the supply air quantity / time unit to be supplied via the air intake duct 11 per unit of time and thus of course the warm exhaust gas quantity (unit of time) to be discharged via the chimney 1, which is necessary for the combustion process can also be reduced correspondingly, which results in better thermal efficiency of the combustion system.
  • the additional use of the supply air regulator 14 allows the combustion process in the furnace to be further stabilized and optimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chimneys And Flues (AREA)
  • Incineration Of Waste (AREA)
EP89810503A 1988-07-04 1989-07-04 Feuerungssystem mit Luft-Abgas-Schornstein Expired - Lifetime EP0350452B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2538/88A CH678223A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-07-04 1988-07-04
CH2538/88 1988-07-04

Publications (3)

Publication Number Publication Date
EP0350452A2 EP0350452A2 (de) 1990-01-10
EP0350452A3 EP0350452A3 (de) 1991-03-27
EP0350452B1 true EP0350452B1 (de) 1995-01-18

Family

ID=4236047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810503A Expired - Lifetime EP0350452B1 (de) 1988-07-04 1989-07-04 Feuerungssystem mit Luft-Abgas-Schornstein

Country Status (4)

Country Link
EP (1) EP0350452B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE117421T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH678223A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE58908899D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103047686A (zh) * 2013-01-17 2013-04-17 黄爱国 生物质燃烧炉及进气方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2851324B1 (fr) * 2003-02-19 2007-01-12 Participation Gestion Dev Ind Conduit terminal pour conduit de cheminee a double paroi
FR2976050B1 (fr) * 2011-06-01 2015-02-27 Poujoulat Installation de chauffage comprenant un appareil de chauffage a bois, une sortie de batiment et un conduit de liaison
CN108507345B (zh) * 2018-03-15 2020-06-19 湘潭市汉和科技有限公司 一种带平衡窗的排烟管

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK108194C (da) * 1960-07-06 1967-10-09 Sten Wilhelm Larsvall Opvarmningsanlæg for beboelsesejendomme og lignende bygninger.
DE2337615A1 (de) * 1973-07-24 1974-02-07 Jetmaster Pty Heizvorrichtung, insbesondere kamin oder feuerstelle fuer wohnraeume
US4141336A (en) * 1977-01-27 1979-02-27 Fitch John C Fireplace stove
US4262608A (en) * 1979-06-14 1981-04-21 Jackson Bert W Method and apparatus for powered flue products exhaust and preheated combustion air supply
DE3435902A1 (de) * 1984-09-29 1986-04-10 Brown, Boveri & Cie Ag, 6800 Mannheim Anordnung zum selbsttaetigen regeln des luftueberschusses einer verbrennung
AT387842B (de) * 1985-05-14 1989-03-28 Hefel Herbert Schornsteinaufsatz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103047686A (zh) * 2013-01-17 2013-04-17 黄爱国 生物质燃烧炉及进气方法
CN103047686B (zh) * 2013-01-17 2016-02-10 黄爱国 生物质燃烧炉及进气方法

Also Published As

Publication number Publication date
CH678223A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-08-15
DE58908899D1 (de) 1995-03-02
EP0350452A3 (de) 1991-03-27
EP0350452A2 (de) 1990-01-10
ATE117421T1 (de) 1995-02-15

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