[go: up one dir, main page]

WO1993019327A1 - Apport d'air secondaire ameliorant la combustion dans un appareil de chauffage semi-ferme - Google Patents

Apport d'air secondaire ameliorant la combustion dans un appareil de chauffage semi-ferme Download PDF

Info

Publication number
WO1993019327A1
WO1993019327A1 PCT/NZ1993/000020 NZ9300020W WO9319327A1 WO 1993019327 A1 WO1993019327 A1 WO 1993019327A1 NZ 9300020 W NZ9300020 W NZ 9300020W WO 9319327 A1 WO9319327 A1 WO 9319327A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
secondary air
flame
flames
burner
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.)
Ceased
Application number
PCT/NZ1993/000020
Other languages
English (en)
Inventor
John Stuart Fleming
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.)
CONTROL AUTOMATION Ltd
Original Assignee
CONTROL AUTOMATION Ltd
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 CONTROL AUTOMATION Ltd filed Critical CONTROL AUTOMATION Ltd
Publication of WO1993019327A1 publication Critical patent/WO1993019327A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F24B1/1808—Simulated fireplaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/02—Disposition of air supply not passing through burner
    • 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

Definitions

  • This invention relates to heating apparatus and more particularly to a fuel burner assembly for use in a semi-enclosed heating apparatus.
  • a semi-enclosed heating apparatus is regarded as a heating apparatus in which at least the ingress of air to support combustion and/or egress of the product of combustion are controlled.
  • Blue flame burners are generally used for water or space heating purposes, however in areas where the flame is required to be visible for aesthetic purposes, such as in domestic or commercial fireplaces where not only heating but also the appearance of a traditional fire burning is required, clearly blue flame technology is not acceptable.
  • a method of burning fuel in a semi- enclosed chamber including the steps of introducing and igniting a fuel and primary air via a burner means mounted in said chamber, exposing a resultant flame to at least one secondary air stream adjacent said burner downstream of ignition of said fuel/primary air mixture to enhance the combustion of said fuel.
  • a method of burning fuel in a semi- enclosed chamber including the step of burning fuel in a fuel/primary air mixture which creates a substantially yellow/orange flame.
  • a burner apparatus including a primary burning means for in use introducing combustible fuel and air to said burner, secondary air means provided to in use introduce and direct a stream air adjacent to a flame emanating from said burner to position a portion of said secondary air alongside at least some of said flames at least downstream of ignition of said fuel.
  • a burner mounted within a semi- enclosed chamber capable of creating in use a low oxygen environment, the secondary air inlet means provided to in use introduce secondary air to said flames from an exterior of said chamber to enhance combustion of said fuel in said chamber.
  • the burner apparatus provides the secondary air inlet means to form a stream of air which substantially flanks at least a portion of the flame downstream of ignition.
  • a burner apparatus incorporating control means for controlling a mix of said fuel/primary air.
  • the burner apparatus provides influencing means to influence the orientation of the stream of secondary air in a predetermined manner to influence a burn path of adjacent flames on combustion of said fuel/air mixture.
  • the secondary air inlet in use provides a stream of secondary air which substantially surrounds or encircles at least a portion of the flames downstream of ignition.
  • the burner apparatus is preferably housed within a semi-enclosed housing chamber or firebox formed in suitable durable materials, such as mild steel and the like.
  • the burner apparatus is provided for use in the burning of gas such as natural gas or propane in conjunction with primary air in a substantially known manner, that is, where a jet of gas is introduced into a burner feed tube and where it mixes with predetermined amounts of primary air to be passed to a burner, for example an elongate grille incorporating a burner gauze perhaps covered with vermiculite, perlite or other non- combustible material and having ceramic fire logs situated thereabove.
  • gas such as natural gas or propane in conjunction with primary air in a substantially known manner, that is, where a jet of gas is introduced into a burner feed tube and where it mixes with predetermined amounts of primary air to be passed to a burner, for example an elongate grille incorporating a burner gauze perhaps covered with vermiculite, perlite or other non- combustible material and having ceramic fire logs situated thereabove.
  • ignited gas will burn with the primary air to provide visual flame characteristics, that is, the appearance of a traditional log fire within an enclosed fire chamber.
  • the burning of the gas and primary air is preferably arranged to provide a yellow or orange flame. In the preferred form this is achieved by controlling the mix ratio of the gas and primary air so that the required characteristics are provided. It is known that such yellow/orange flame characteristics generally do not provide for efficient combustion and there is a tendency for sooting, unburnt emissions to exit from the fire chamber and general inefficiency.
  • the present invention provides for the introduction of secondary air downstream from ignition of the fuel/primary air mix.
  • Secondary inlet air is introduced in a "sheet like" stream substantially adjacent at least two sides of the burner to provide a "sheathing” or partial “encapsulation” of the flame downstream from ignition.
  • the invention enables the required desirable visual flame characteristics with a minimal flow of air and combustion gases through the chamber to thus reduce unwanted heat losses from the flue of the apparatus, yet achieve relatively high levels of combustion heat and low exhaust emissions.
  • the preferred form of invention also facilitates control of the "flow" of the flame by introduction of the secondary air in such a way that, for example, the flame can be "parted” to pass either side of a fire log or other obstruction to avoid undue sooting and/or other incomplete combustion of fuel which would normally occur should.the flame play upon the log in an uncontrolled manner.
  • Directional influence on the flames is achieved by providing directed ports, apertures or vanes in the secondary air outlet which create a jet or jets of secondary air in a predetermined direction. This enables influence of flame orientation in use.
  • Figure 1 is a substantially diagrammatic cross- sectional side elevation of a heater apparatus incorporating the burner according to the invention mounted in a semi-enclosed firebox in conjunction with a vermiculite topped burner as burner described hereinbefore, mounted with fire logs thereabove.
  • Figure 2 shows a cut away cross-sectional view of the burner means perse of Figure 1.
  • the heater apparatus as generally indicated by arrow 1, has walls 2 to define a chamber 3 therein in which a burner 4 and associated fire logs 5 are housed. (See also Figure 2).
  • a front wall 6 of the heater 1 preferably incorporates a window or viewport 7 which enables, in use, the heater apparatus to provide "visual flame” characteristics.
  • the burner 4 in the preferred form of the invention is arranged to be substantially elongate and extend approximately across the width of the heater chamber 3, a length substantially commensurate with a length or the fire logs 5 to crease the effect of the base of a traditional fire.
  • the burner 4 is preferably formed in suitable fire resistent materials, such as metals, and is arranged to be generally triangular in cross-section as is seen by Figures 1 and 2.
  • suitable fire resistent materials such as metals
  • the burner 4 provides a substantially inclined gas permeable upper front face 8 upon which is mounted the bed of vermiculite 9 or other non-combustible particulate material supported by a gauze sheet 7.
  • Beneath the upper front face 8 and in a substantially plenum chamber 11 is preferably arranged a elongate diffuser 12 which is perforated at predetermined intervals and coupled with a gas supply pipeline 13 (see Figure 1) so that it will be appreciated a controlled amount of gas can be discharged into the plenum chamber 11 and mix with primary inlet air from an air inlet passageway 14 in a base of said heater casing 2 via preferably a perforated bottom portion 15 of said burner casing 4.
  • An additional elongate gas jet 16 is provided along an upper rear portion of the burner 4 which does not have the vermiculite bed 9 mounted thereon.
  • the elongated diffuser is dispensed with and is alternated by one or a plurality of gas jets with an associated ventury primary air aperture such that a flow of gas c through said gas outlet creates a ventury effect to draw primary air into the plenum chamber 11.
  • the burner 4 facilitates the supply of a fuel/primary air mixture
  • the gas jet 16 will tend to lick about the fire logs to represent traditional burning of logs on a fire.
  • the gas jet 16 provides a "sheet" of flame which is preferably
  • an upper pair of fire logs 5c can be arranged substantially transversely of the fire logs 5a and 5b so
  • a control means (not shown) provided on the gas supply line 13 is used to ensure that a mix ratio of primary air and fuel in the burner 4 can be achieved so that flames emanating from the burner 4 are substantially yellow/orange. Relatively incomplete burning can thus result.
  • Secondary air inlets 20, 21 and 22 are in the preferred form of the invention provided to in use pass secondary inlet air in a substantially controlled manner (such as by combustion draft) to the flame front of ignited fuel/primary air.
  • the secondary air is preferably introduced to the burning fuel/primary air on either side of said burner 4, that is, up the inclined upper front face 8 and from behind the burner 4, in a stream as shown particularly in figure 1 so that the secondary air is introduced to the flame front of fuel/ primary air in a stream to substantially "encapsulate” or "sheath” portions of the flame and enhance the burn yet enabling the flame to retain its yellow/orange flame colour.
  • the secondary air inlets 20, 21 and 22 are provided to be controllable by adjustable choke means 23 (see Figure 1) connected with an actuator 24 which enables control and/or adjustment or setting of a mix ratio of fuel/primary air to secondary air and the "split" of secondary air passing through the respective secondary air inlets 20 , 21 and 22 .
  • setting of the choke means 23 can be operator adjustable within a predetermined range , or alternatively factory set .
  • the secondary air inlets 20, 21 and 22 can be provided as a series of slots, tubes or apertures preferably adjacent to the point of ignition of the fuel/primary air mix.
  • baffle arrangement 2a Whilst the baffle arrangement 2a is shown in the preferred form of the invention to extend forwardly of a rear wall of the casing 2 to define an extended pathway
  • this assembly is not essential to the invention and in some alternative embodiments is dispensed with.
  • the secondary air inlets 20, 21 and 22 are arranged in predetermined orientations relative to the flames fuel/primary air combustion so that the secondary air tends to "direct” or orientate the flames in a predetermined manner. This effect is particularly apparent in respect of the secondary air inlet 20 where ⁇ secondary inlet air tends to cause the flames to burn rearwardly of the apparatus substantially beneath the fire log 5a, to create a traditional burning effect, whilst also providing oxygenated secondary air for more efficient combustion.
  • vanes 19 5 are also introduced into the secondary air inlet 21 to direct a secondary air flow therefrom, such, for example, to slit the flame about the upper fire log 5c to create the impression of flames licking about the fire log 5c but without the flames actually contacting 0 the fire log 5c and creating sooting, incomplete combustion and therefore unwanted emissions from the unit.
  • this invention 5 there is provided a means of controlling the combustion of fuel/primary air to provide a desired yellow/orange flame whilst enhancing the burning characteristics of said flame to achieve higher levels of combustion and thus lower emissions in an enclosed fire chamber with the benefits of low mass throughput through the unit and resultant flue heat losses enabling greater heat output for a given size of heater apparatus or alternatively an ability to reduce the size and cost of the apparatus whilst retaining heat output.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

Appareil de chauffage et son procédé d'utilisation. L'appareil comprend un brûleur facilitant le mélange et l'inflammation d'un mélange air/combustible primaire par exposition de la flamme ainsi obtenue à de l'air frais secondaire en aval de l'inflammation du mélange air/combustible primaire, ce qui permet d'obtenir une combustion du combustible plus complète dans un milieu pauvre en oxygène. On peut introduire l'air secondaire de manière qu'il puisse sensiblement enrober ou envelopper au moins partiellement les flammes. Le procédé consiste à réaliser un mélange air/combustible primaire apte à créer une flamme orangée ou jaunâtre voulue, et l'appareil permet une amélioration de la combustion de ce mélange au contact dudit air secondaire.
PCT/NZ1993/000020 1992-03-26 1993-03-26 Apport d'air secondaire ameliorant la combustion dans un appareil de chauffage semi-ferme Ceased WO1993019327A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ242147 1992-03-26
NZ24214792A NZ242147A (en) 1992-03-26 1992-03-26 Simulated log fire gas burner with semi-enclosed chamber containing primary burner creating yellow and orange flames with secondary air directed against the flames

Publications (1)

Publication Number Publication Date
WO1993019327A1 true WO1993019327A1 (fr) 1993-09-30

Family

ID=19923931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1993/000020 Ceased WO1993019327A1 (fr) 1992-03-26 1993-03-26 Apport d'air secondaire ameliorant la combustion dans un appareil de chauffage semi-ferme

Country Status (3)

Country Link
AU (2) AU3546493A (fr)
NZ (1) NZ242147A (fr)
WO (1) WO1993019327A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841327A1 (fr) * 2002-06-06 2003-12-26 Aj Wells & Sons Poele
DE19920772B4 (de) * 1999-04-03 2004-04-01 Fritz Trinker Gas-Brenner, insbesondere für einen Heizofen oder offenen Kamin
WO2005012794A1 (fr) * 2003-08-04 2005-02-10 Jehi As Dispositif de bruleur post-combustion pour foyers
CN105890033A (zh) * 2016-06-06 2016-08-24 杜增杰 热均匀节能火炕及安装方法
CN110986148A (zh) * 2019-05-15 2020-04-10 宁波丽辰电器有限公司 一种燃气壁炉燃烧装置
US10684040B2 (en) 2016-08-25 2020-06-16 Fire Chief Industries LLC Furnace
US10801738B2 (en) 2017-08-09 2020-10-13 Fire Chief Industries LLC Furnace

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502463A (en) * 1984-04-26 1985-03-05 Gregory Willis H Method and apparatus for efficiently capturing and distributing heat produced by gas logs
JPS62238909A (ja) * 1986-04-09 1987-10-19 Matsushita Electric Ind Co Ltd 燃焼装置
JPS62238910A (ja) * 1986-04-09 1987-10-19 Matsushita Electric Ind Co Ltd 燃焼装置
JPS62245013A (ja) * 1986-04-18 1987-10-26 Matsushita Electric Ind Co Ltd 温風暖房器
US4976253A (en) * 1990-01-12 1990-12-11 Majco Building Specialties, L.P. Method and apparatus for burning gas in the combustion chamber of a fireplace
JPH0445307A (ja) * 1990-06-13 1992-02-14 Matsushita Electric Ind Co Ltd 燃焼装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502463A (en) * 1984-04-26 1985-03-05 Gregory Willis H Method and apparatus for efficiently capturing and distributing heat produced by gas logs
JPS62238909A (ja) * 1986-04-09 1987-10-19 Matsushita Electric Ind Co Ltd 燃焼装置
JPS62238910A (ja) * 1986-04-09 1987-10-19 Matsushita Electric Ind Co Ltd 燃焼装置
JPS62245013A (ja) * 1986-04-18 1987-10-26 Matsushita Electric Ind Co Ltd 温風暖房器
US4976253A (en) * 1990-01-12 1990-12-11 Majco Building Specialties, L.P. Method and apparatus for burning gas in the combustion chamber of a fireplace
JPH0445307A (ja) * 1990-06-13 1992-02-14 Matsushita Electric Ind Co Ltd 燃焼装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, M-1255, page 48; & JP,A,4 045 307 (MATSUSHITA ELECTRIC IND CO LTD), 14 February 1992. *
PATENT ABSTRACTS OF JAPAN, M-682, page 131; & JP,A,62 238 909 (MATSUSHITA ELECTRIC IND CO LTD), 19 October 1987. *
PATENT ABSTRACTS OF JAPAN, M-682, page 131; & JP,A,62 238 910 (MATSUSHITA ELECTRIC IND CO LTD), 19 October 1987. *
PATENT ABSTRACTS OF JAPAN, M-685, page 19; & JP,A,62 245 013 (MATSUSHITA ELECTRIC IND CO LTD), 26 October 1987. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19920772B4 (de) * 1999-04-03 2004-04-01 Fritz Trinker Gas-Brenner, insbesondere für einen Heizofen oder offenen Kamin
FR2841327A1 (fr) * 2002-06-06 2003-12-26 Aj Wells & Sons Poele
WO2005012794A1 (fr) * 2003-08-04 2005-02-10 Jehi As Dispositif de bruleur post-combustion pour foyers
CN105890033A (zh) * 2016-06-06 2016-08-24 杜增杰 热均匀节能火炕及安装方法
US10684040B2 (en) 2016-08-25 2020-06-16 Fire Chief Industries LLC Furnace
US10801738B2 (en) 2017-08-09 2020-10-13 Fire Chief Industries LLC Furnace
CN110986148A (zh) * 2019-05-15 2020-04-10 宁波丽辰电器有限公司 一种燃气壁炉燃烧装置

Also Published As

Publication number Publication date
AU3546493A (en) 1993-09-30
AU6068696A (en) 1996-10-03
NZ242147A (en) 1996-05-28

Similar Documents

Publication Publication Date Title
US5816237A (en) Low emission fireplace
US5452709A (en) Tiered-logs gas-burning heaters or fireplace insert
JP2553267B2 (ja) 低ＮＯｘバーナー及びその使用方法
US4976253A (en) Method and apparatus for burning gas in the combustion chamber of a fireplace
US5320520A (en) Gas burner assembly for simulating a natural log fire
US4838241A (en) Fireplace natural gas and propane burner assembly
JP2002206709A (ja) 低ＮＯｘプレミックスバーナー装置および方法
CA2162888C (fr) Systeme de bruleur a gaz ameliore
US5052370A (en) Gas burner assembly including emberizing material
DE69821362T2 (de) Verfahren und vorrichtung zur verminderung der co- und nox-emissionen in einem heizgerät
CA1245544A (fr) Methodes et dispositifs de combustion a faible degagement de no.sub.x
WO1993019327A1 (fr) Apport d'air secondaire ameliorant la combustion dans un appareil de chauffage semi-ferme
US5400525A (en) Flame cone for grain bin dryer
US4827852A (en) Catalytic wood stove
US5769623A (en) Oil fired burner
GB2091414A (en) Solid fuel combustion appliances
KR200294583Y1 (ko) 벽난로용 다중 연소장치
CA2320272A1 (fr) Bruleur a gaz
EP1217294A2 (fr) Brûleur à tube rayonnant
EP0766046B1 (fr) Appareil de chauffage à fluide inflammable
GB2221026A (en) Gas burner
RU2039319C1 (ru) Горелочное устройство
GB2207499A (en) Simulated solid fuel gas fire
CA1198641A (fr) Poele a bois catalytique
JPS61502556A (ja) 液体燃料のためのポットバ−ナ

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT BB BG BR CA CH CZ DE DK ES FI GB HU JP KP KR KZ LK LU MG MN MW NL NO PL PT RO RU SD SE SK UA US VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA