EP3081860A1 - Four - Google Patents

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Publication number
EP3081860A1
EP3081860A1 EP16000756.3A EP16000756A EP3081860A1 EP 3081860 A1 EP3081860 A1 EP 3081860A1 EP 16000756 A EP16000756 A EP 16000756A EP 3081860 A1 EP3081860 A1 EP 3081860A1
Authority
EP
European Patent Office
Prior art keywords
flue gas
combustion chamber
chamber
combustion
furnace
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.)
Withdrawn
Application number
EP16000756.3A
Other languages
German (de)
English (en)
Inventor
Karl Stefan Riener
Ingwald Obernberger
Thomas Brunner
Manuel Kössl
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.)
RIKA Innovative Ofentechnik GmbH
Original Assignee
RIKA Innovative Ofentechnik GmbH
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 RIKA Innovative Ofentechnik GmbH filed Critical RIKA Innovative Ofentechnik GmbH
Publication of EP3081860A1 publication Critical patent/EP3081860A1/fr
Withdrawn legal-status Critical Current

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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
    • F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
    • F23B60/02—Combustion apparatus in which the fuel burns essentially without moving with combustion air supplied through a grate
    • 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
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B90/00—Combustion methods not related to a particular type of apparatus
    • F23B90/04—Combustion methods not related to a particular type of apparatus including secondary combustion
    • 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
    • F24B1/02—Closed stoves
    • F24B1/026—Closed stoves with several combustion zones
    • 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 present invention relates generally to furnaces for heat generation, and more particularly to a furnace for generating heat with a post-combustion chamber.
  • furnaces for heat generation are known which are particularly suitable for burning solid fuels such as wood, e.g. Logs or pellets, or other solid fuels are suitable.
  • solid fuels such as wood, e.g. Logs or pellets, or other solid fuels are suitable.
  • Such ovens are typically also used in living quarters, e.g. in the form of a stove, placed.
  • wood-burning stoves which are placed like stoves in particular in living spaces, the desire to optimize the combustion by appropriate control of the air supply and thus, for example, to reduce the particulate matter pollution and the emission of nitrogen oxides.
  • a similar type has a combustion device that is in DE 10 2009 050 507 A1 is shown.
  • the combustion device has a combustion chamber and a Nachbrennraum, wherein combustion chamber and Nachbrennraum are separated by a combustion grate.
  • a primary air supply is arranged above the combustion grate. The flue gas is passed through the combustion grate in the afterburner.
  • the object of the present invention is to provide an improved furnace for heat generation, in particular a wood-burning stove, such as a log or pellet stove.
  • the present invention provides a furnace for heat generation, in particular a wood-burning stove, such as a log furnace or pellet stove, comprising: a combustion chamber having a back wall and two side walls, an afterburner chamber located below the combustion chamber, and a flue gas duct for delivery of flue gas from the combustion chamber in the secondary combustion chamber, wherein the flue gas channel is arranged on the rear wall of the combustion chamber or on one of the side walls.
  • a wood-burning stove such as a log furnace or pellet stove
  • FIG. 1 to 2 an embodiment of a wood oven 1 in accordance with the present invention is illustrated. Before a detailed description follows first general explanations to the embodiments and their advantages.
  • the embodiments relate to a furnace for heat generation, which is designed to burn a solid fuel in a combustion chamber.
  • solid fuels are considered, which are made of biomass, such as pellets, wood chips, firewood, but also fuels such as brown, wood or hard coal and the like.
  • the further description also relates, in particular, without the present invention being restricted thereto, to a wood-burning stove, such as a wood-burning stove or a pellet stove, which is designed, for example, as a stove, tiled stove or the like and is typically set up in a living room.
  • a wood-burning stove such as a wood-burning stove or a pellet stove, which is designed, for example, as a stove, tiled stove or the like and is typically set up in a living room.
  • a furnace for generating heat in particular a wood-burning stove, such as a log-burning stove or pellet stove, comprises a combustion chamber with a rear wall and two opposite side walls. Opposite the rear wall of the combustion chamber is typically closed on its front wall with an oven door.
  • the side and / or back wall of the furnace may be made of various materials typical of furnaces (e.g., sheet metal, cast iron, etc., as well as a cladding with firebricks or the like inside).
  • the present invention is not limited to a particular material configuration of the back wall or the side wall.
  • the combustion chamber can also have any shape.
  • the walls of the combustion chamber that is, the front, rear and side walls may, viewed in a horizontal cross-section, lie on a quadrangle, square or rectangle, a triangle or another polygon.
  • the combustion chamber can also have a round cross-section, e.g. circular or elliptical.
  • the rear wall, front wall and side walls are to be considered as corresponding portions of a continuous combustion chamber wall having a round horizontal cross section.
  • the furnace further comprises an afterburner chamber disposed below the combustion chamber and a flue gas passage for supplying flue gas from the combustion chamber to the reheat chamber, the flue gas passage being disposed on the rear wall of the combustion chamber and / or on one of the side walls.
  • the flue gas can continue to burn, as a result of which the total pollutant emissions of the furnace can be reduced.
  • the flue gas channel may extend over the entire width of the rear or side wall of the combustion chamber or extend over only a part of the rear or side wall.
  • the flue gas channel may be formed by separate flue gas channel walls and / or partially or completely by areas of the rear or side walls of the combustion chamber and / or a housing of the furnace, which at least partially surrounds the combustion chamber.
  • the flue gas duct can divert the flue gas from the combustion chamber and leads into the afterburner chamber below the combustion chamber and can also be arranged outside the combustion chamber, the combustion chamber and the afterburner can be separated from each other.
  • the flue gas flow thus goes against gravity from the bottom up in the combustion chamber in the flue gas duct and then in the flue gas duct from top to bottom in the direction of gravity in the secondary combustion chamber located below the combustion chamber.
  • the afterburner chamber may have substantially the same horizontal cross section as the combustion chamber, but it may also be formed independently of the shape or independently of the cross section of the combustion chamber.
  • the combustion chamber may be partially formed by walls of a housing of the furnace and / or it may be formed independently.
  • the primary air supply into the combustion chamber can be designed so that the flame, which arises during the combustion of fuel in the furnace, burns upright.
  • the primary air supply may extend at least partially between the afterburner chamber and the bottom of the combustion chamber and / or the primary air supply may be partially, e.g. in the form of an air passage, extend through the afterburner chamber therethrough.
  • supplied primary air can be preheated before it is guided into the combustion chamber.
  • the primary air can be fed from below into the combustion chamber.
  • the flue gas can be sucked from an upper region of the combustion chamber through the flue gas channel, whereby the flame in the combustion chamber burns upright by the corresponding train, especially when primary air is supplied in a lower region and / or through the bottom of the combustion chamber.
  • the flame can, for example, be visible through a glass pane in the oven door.
  • the combustion chamber can have an opening in an upper region of the rear wall through which flue gas flows from the combustion chamber into the flue gas channel.
  • the flue gas channel can be connected directly to the opening or connected directly to it.
  • the furnace may further comprise a housing, wherein the flue gas passage is partially formed by a rear wall of the housing.
  • the flue gas duct may e.g. be formed between an outer side of the rear wall of the combustion chamber and an inner side of the rear wall of the housing.
  • the side walls of the flue gas duct may e.g. be formed by the side end walls of the housing and / or the flue gas channel has corresponding side walls which extend away from the rear wall of the combustion chamber.
  • the flue gas duct has a combustion air supply.
  • the combustion air supply may also be connected to the primary air supply.
  • the afterburner chamber may also have a combustion air supply via which fresh air for the combustion of flue gas can be supplied.
  • the combustion air supply may also be connected to the primary air supply.
  • the afterburner has a flue gas port for connecting a heat exchanger.
  • the heat exchanger can, for example, be water-conducting or have another storage material, such as, for example, firebricks or the like.
  • the heat exchanger can also be configured as a convection air exchanger, in which the flue gas is heated by the emitted heat radiation (convection) air.
  • the flue gas connection can in principle be provided at any point in the afterburner chamber. In some embodiments, it is arranged on one or two sides and / or rear, so that in some embodiments, more than one heat exchanger can be supplied with flue gas and flowed through.
  • the flue gas which flows through one or more heat exchangers, passes through a chimney connection into a chimney.
  • the flue gas can also be passed directly through a chimney connection, which is provided, for example. Rear or top of the oven, in a fireplace.
  • the furnace may comprise one (or more) heat exchangers which is connected to the flue gas connection of the afterburning chamber.
  • the furnace may comprise a housing, the afterburner chamber being partially formed by the housing.
  • the bottom of the afterburner may be formed by a bottom wall of the housing, the side walls by side end walls of the housing and / or the rear wall through the rear wall of the housing.
  • the upper ceiling wall may, for example, be formed by a separate wall, which is arranged in the housing below the combustion chamber.
  • the oven includes a grate and a primary air supply, wherein the primary air supply directs primary air from below through the grate into the combustion chamber.
  • This type of primary air supply is known in principle and allows a good supply of the combustion chamber with primary air and allows good traction.
  • the oven may be configured as a natural draft oven and / or it may have a flue gas fan and / or a primary air fan.
  • FIGS. 1 to 2 These illustrate an embodiment of a furnace 1 according to the invention, which is designed, for example, for the combustion of wood.
  • the wood stove 1 has a combustion chamber 2 in which (symbolically) wood 4 is arranged as a solid fuel.
  • An afterburner 3 for the combustion of the flue gas is arranged below the combustion chamber 2.
  • the combustion chamber 2 has a rear wall 7, at the top of which an opening 5 is provided, through which flue gas, which is formed during combustion of the wood 4 in the combustion chamber 2, enters a flue gas duct 6.
  • the opening 5 is configured rectangular in the embodiment and has a cross section corresponding to the cross section of the flue gas channel 6.
  • the flue gas channel 6 connects the opening 5 with the afterburner chamber 3, flows from above into the afterburner chamber 3 and directs flue gas from the combustion chamber 2 into the afterburner chamber 3 (see arrows).
  • the wood-burning stove 1 has a housing 12 having a ceiling wall 12a, a rear wall 12b, a front wall 12c with an oven door 11, a bottom 12d, and two side walls 12e and 12f.
  • the combustion chamber 2 is formed by the front wall 12c, the ceiling wall 12, the rear wall 7, by two portions of the side walls 12e and 12f and a grid 10 on which the wood 4 is arranged for combustion.
  • the flue gas duct 6 is formed by the rear wall 7 of the combustion chamber 2, by a portion of the rear wall 12 b and portions of the side walls 12 e and 12 f and by a small portion of the ceiling wall 12 of the housing 12.
  • the flue gas channel 6 thus extends between the rear wall 7 of the combustion chamber 2 and the rear wall 12b of the housing 12, along the entire rear wall 7 of the combustion chamber 2 in the vertical direction until it opens into the afterburner chamber 3.
  • a combustion air connection 14 is provided approximately in the middle of the flue gas duct 6, can be passed through the fresh air into the flue gas duct 6 for combustion of flue gas in the flue gas duct 6.
  • the afterburner chamber 3 is formed by the bottom 12 d, two portions of the side walls 12 e and 12 f of the housing 12, by corresponding portions of the front wall 12 c and the rear wall 12 b of the housing 12 and a ceiling wall 16.
  • the ceiling wall 16 is spaced from the grid 10 and connected to the rear wall 7, and it separates the afterburner 3 and the combustion chamber 2 from each other such that the afterburner chamber 3 communicates with the combustion chamber 2 only via the flue gas channel 6.
  • a gap is provided between the top wall 16 of the afterburning chamber 3 and the grate 10, a gap is provided in which a primary air supply 9 supplies primary air, so that primary air flows from below through openings of the grate 10 into the combustion chamber 2 and supplies the combustion there with primary air.
  • an ash box (not shown).
  • the primary air supplied as described above supplies combustion of the wood 4 located on the grate 10 with oxygen from below.
  • the resulting during combustion flue gas flows against the force of gravity in the combustion chamber 2 upwards and
  • the flue gas duct 6 then directs the flue gas in the direction of gravity from above into the afterburner chamber 3 under the combustion chamber 2, wherein the flue gas burns in the flue gas duct 6 and in the afterburner chamber 3.
  • a blower (not shown) may assist the flue gas flow.
  • a combustion air connection 15 is provided in the lower region of the afterburner chamber 3, is supplied through the fresh air for combustion of the flue gas in the afterburner 3.
  • the afterburner chamber 3 also has two flue gas ports 8a and 8b, which are arranged opposite each other in the left and right side wall 12e and 12f of the housing 12 in the region of the afterburner chamber 3.
  • a first heat exchanger 13a is connected, and at the opposite flue gas port 8b of the left side wall 12f is connected in the second heat exchanger 13b.
  • the two heat exchangers 13a and 13b are traversed by flue gas from the afterburning chamber 3 which, when flowing, transfers its heat to a heat storage medium, e.g. Water, in the heat exchanger 13 a and 13 b emits.
  • a heat storage medium e.g. Water
  • the heat exchangers 13a and 13b are connected via a chimney port to a chimney (not shown), so that the flue gas from the heat exchangers 13a and 13b is led into the chimney.

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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)
  • Solid-Fuel Combustion (AREA)
EP16000756.3A 2015-04-14 2016-03-31 Four Withdrawn EP3081860A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015004823.6A DE102015004823A1 (de) 2015-04-14 2015-04-14 Ofen

Publications (1)

Publication Number Publication Date
EP3081860A1 true EP3081860A1 (fr) 2016-10-19

Family

ID=55650003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000756.3A Withdrawn EP3081860A1 (fr) 2015-04-14 2016-03-31 Four

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EP (1) EP3081860A1 (fr)
DE (1) DE102015004823A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3376107A1 (fr) * 2017-03-13 2018-09-19 Karl Stefan Riener Four à biomasse
EP3434975A4 (fr) * 2016-03-21 2019-11-20 Seong Woo Kim Chambre de combustion pour divers types de combustibles solides

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US728527A (en) * 1899-12-28 1903-05-19 James H Waters Heating-stove.
FR526781A (fr) * 1919-10-18 1921-10-13 Elie Joseph Vermeyen Poele à feu continu à double enveloppe supprimant la fumée
US1939832A (en) * 1929-10-10 1933-12-19 Charles G Schott Stove
EP0409790A1 (fr) * 1989-07-19 1991-01-23 Willi Hager Installation de combustion
EP0579013A1 (fr) 1992-07-15 1994-01-19 Rüegg Cheminée AG Poêle de chauffage
US5413088A (en) * 1993-01-13 1995-05-09 Oviatt; William T. Wood burning heating unit
DE102009050507A1 (de) 2009-10-23 2011-04-28 Heribert Posch Feststoff-Brennvorrichtung mit Wärmetauscher zur Wärmeübertragung an einen Flüssigkeits-Kreislauf

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372287A (en) * 1980-10-17 1983-02-08 Linden Roy E V D Wood-burning stove and method for burning wood
AT3537U1 (de) * 1999-06-04 2000-04-25 Kloss Erich Herd

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US728527A (en) * 1899-12-28 1903-05-19 James H Waters Heating-stove.
FR526781A (fr) * 1919-10-18 1921-10-13 Elie Joseph Vermeyen Poele à feu continu à double enveloppe supprimant la fumée
US1939832A (en) * 1929-10-10 1933-12-19 Charles G Schott Stove
EP0409790A1 (fr) * 1989-07-19 1991-01-23 Willi Hager Installation de combustion
EP0579013A1 (fr) 1992-07-15 1994-01-19 Rüegg Cheminée AG Poêle de chauffage
US5413088A (en) * 1993-01-13 1995-05-09 Oviatt; William T. Wood burning heating unit
DE102009050507A1 (de) 2009-10-23 2011-04-28 Heribert Posch Feststoff-Brennvorrichtung mit Wärmetauscher zur Wärmeübertragung an einen Flüssigkeits-Kreislauf

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3434975A4 (fr) * 2016-03-21 2019-11-20 Seong Woo Kim Chambre de combustion pour divers types de combustibles solides
US10890321B2 (en) 2016-03-21 2021-01-12 Seong Woo Kim Combustor for various types of solid fuels
EP3376107A1 (fr) * 2017-03-13 2018-09-19 Karl Stefan Riener Four à biomasse

Also Published As

Publication number Publication date
DE102015004823A1 (de) 2016-11-03

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