EP2098780A1 - Brenneranordnung - Google Patents

Brenneranordnung Download PDF

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Publication number
EP2098780A1
EP2098780A1 EP08102279A EP08102279A EP2098780A1 EP 2098780 A1 EP2098780 A1 EP 2098780A1 EP 08102279 A EP08102279 A EP 08102279A EP 08102279 A EP08102279 A EP 08102279A EP 2098780 A1 EP2098780 A1 EP 2098780A1
Authority
EP
European Patent Office
Prior art keywords
burner
flame
brazier
fuel
granular fuel
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Withdrawn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
EP08102279A
Other languages
English (en)
French (fr)
Inventor
Stephen William John Grant
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.)
Alley Enterprises Ltd
Original Assignee
Alley Enterprises 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 Alley Enterprises Ltd filed Critical Alley Enterprises Ltd
Priority to EP08102279A priority Critical patent/EP2098780A1/de
Publication of EP2098780A1 publication Critical patent/EP2098780A1/de
Withdrawn legal-status Critical Current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
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • F23B1/28—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/30—Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/38—Combustion apparatus using only lump fuel characterised by the form of combustion chamber for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B50/00—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone
    • F23B50/12—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone the fuel being fed to the combustion zone by free fall or by sliding along inclined surfaces, e.g. from a conveyor terminating above the fuel bed
    • 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F23C1/02—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air lump and liquid fuel
    • 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F23C1/04—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air lump and gaseous fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/12—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating using gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • F23G7/105—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses of wood waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q13/00—Igniters not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2204/00—Supplementary heating arrangements
    • F23G2204/10—Supplementary heating arrangements using auxiliary fuel
    • F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/26—Biowaste
    • F23G2209/261—Woodwaste

Definitions

  • the present invention relates to a burner assembly for an enclosed water heating boiler for burning solid fuel of the type comprising: walls forming a combustion chamber enclosure, hollow heat exchangers arranged for carrying water to be heated from by at least portion of the walls, and the boiler assembly comprising two burners namely a granular fuel burner of the type comprising a brazier fed with the granular fuel and a fluid fired burner characterised in that the fluid fired burner is mounted remote from the brazier whereby the flame generated by the fluid fired burner is directed beside and substantially away from the brazier and in which a flame transfer device is provided to direct some of the flame generated by the fluid fired burner as a concentrated jet against portion of the granulated fuel to ignite the granular fuel.
  • granular fuel is used to include not only granular fuel such as wood pellets, but also other solid materials such as ground or semi-shredded husks of maize and similar products together with particles of combustible waste material and other recognised fuels such as coal, peat and similar materials.
  • fluid fired burner is used to include not alone burners that burn liquids such as bio-fuels, for example, bio-diesel, bio-kerosene or simply kerosene and diesel, but also gas fired burners.
  • JP 2005009768A (Yamamoto ) describes a wood pellet burner which has an electrical heating element which is moved against the wood pellets for ignition.
  • JP 58008907A (Gotou Shinsaku ) describes a solid fuel burner which burns waste material such as used tyres or the like, but also wood and coal and has a liquid fuel burner for kerosene or gas fuel for starting the burner. It also describes that if the solid fuel is not available, it is acceptable to use only the liquid fuel. Similarly, it states that the liquid fuel burner may be replaced by a gas fuel burner.
  • GB Patent Specification No. 278554A (Camelon ) describes a further gas burner used to light a solid fire, as does GB Patent Specification No. 281461A (Russell ).
  • the present invention is directed towards overcoming the problems referred to above in relation to the present construction of burner assemblies and also boilers fitted with such burner assemblies. It is also directed at providing a more efficient method of using such burner assemblies and operating such boilers.
  • a burner assembly for an enclosed water heating boiler for burning solid fuel of the type comprising: walls forming a combustion chamber enclosure, hollow heat exchangers arranged for carrying water to be heated from by at least portion of the walls, and the burner assembly comprising two burners namely a granular fuel burner of the type comprising a brazier fed with the granular fuel and a fluid fired burner characterised in that the fluid fired burner is mounted remote from the brazier whereby the flame generated by the fluid fired burner is directed beside and substantially away from the brazier and in which a flame transfer device is provided to direct some of the flame generated by the fluid fired burner as a concentrated jet against portion of the granular fuel to ignite the granular fuel.
  • the fluid fired burner is mounted below the brazier which allows for very efficient operation.
  • the flame transfer device is a tube having an entrance projecting into the path of the flame and an exit directed onto a concentrated area of the brazier.
  • the flame transfer device comprises a diverter flap mounted on the brazier. Such a flap may be formed from a curved scoop-like plate to concentrate flame from the fluid fired burner against the granular fuel.
  • the flame transfer device is movable from a position to lie within the flame exiting from the fluid fired burner and a position remote from the flame. This may be carried out by a solenoid valve and associated pneumatic ram.
  • a method of operating a burner assembly of the type described above is provided in which, on start up of the burner assembly, the granular fuel combustion air feed is initiated at low volume as the fluid fuel fired burner is starting to ignite the granular fuel and is increased to optimum volume as the fluid fired burner is switched off.
  • the fluid fired burner and the granular fuel may be burned in parallel to provide a boot in combustion capacity of the boiler.
  • an enclosed water heating boiler indicated generally by the reference numeral 1, having a plurality of walls, namely a top wall 2, side walls 3, base wall 4 and front wall formed by a door 5 forming a combustion chamber enclosure 6.
  • the walls 2 and 3 form hollow water carrying heat exchangers 7 and 8 respectively. Details of these are not included because they are all conventional. There may be other hollow heat exchangers mounted in the combustion chamber 6.
  • a boiler assembly indicated generally by the reference numeral 10 comprising a granular fuel burner, namely, a wood pellet burner 11 and a fluid fired burner, namely, an oil fired burner 12.
  • the wood pellet burner 11 is a specific type of granular fuel burner and other granular fuel burners could be used.
  • the wood pellet burner 11 includes a brazier 13 having a perforated floor 14 and mounting a flame transfer device indicated generally by the reference numeral 15 which flame transfer device 15 comprises a diverter flap 16 pivotally mounted on the brazier 13 adjacent to the perforated floor 14.
  • the flame transfer device 15 is in the form of a curved scoop-like plate 16 as illustrated in Fig. 3 .
  • the plate 16 is, in turn, connected to a solenoid valve and associated pneumatic ram 17.
  • an auger 20 operated by a motor 21 feeding a flexible hose 22 to deliver wood pellets from a wood pellet storage (not shown) to the wood pellet burner 11.
  • the wood pellets are identified by the reference numeral 25.
  • the oil burner 12 is a conventional oil burner, but could be any fluid fired burner such as a gas burner. Conventional controls, thermostats etc provided and are not shown.
  • Fig. 1 the burner assembly operating as a wood pellet burner only and heating the combustion chamber enclosure 6, the flame or hot combustion gases being represented by the arrows.
  • Fig. 2 illustrates the position at start up.
  • the oil burner 12 is operated and the flap 16 is pivoted downwards by the pneumatic ram 17 such that it projects within the flame emanating from the oil fired burner 12. This would not be necessarily the hottest part of the flame, but would be flame somewhere in the order of 800°C.
  • the flame is then directed in a concentrated manner up the scoop-like flap 16 through some of the apertures 13 of the brazier 12.
  • a small amount of the wood pellets are quickly burned and ignited.
  • the ignited wood pellets quickly burn the rest of the wood pellets and this combustion is formed with relatively little formation of CO. Further, it is envisaged that a certain amount of air will be directed beneath the brazier 12 by starting the fan which is usually fitted to such boilers thus ensuring that there will be sufficient air for combustion of the wood pellets while only a small amount of the wood pellets are initially ignited. This greatly reduces the CO formation and the amount of time it takes for the wood pellets to burn at the optimum rate. Then the oil burner is switched off and the boiler operates as illustrated in Fig. 1 . Fig. 4 shows the boiler operating simply with the oil burner 12 being used and the granular fuel burner not in operation. It will be noted that the oil fired burner flame is directed substantially beside and away from the brazier 13.
  • a boiler 1 and burner assembly 10 as heretofore.
  • the only difference between the burner assembly as illustrated is that instead of the pivoting flap 16 there is provided a transfer device, again, for clarity, identified generally by the reference numeral 15, which heat transfer device 15 comprises a fixed tube 31 having open ends forming an entrance 32 and an exit 33 and mounted beneath the apertures 14 of the brazier 13.
  • the transfer device 15 comprises a fixed tube 31 having open ends forming an entrance 32 and an exit 33 and mounted beneath the apertures 14 of the brazier 13.
  • the flame is diverted up the fixed tube 31, again in a concentrated manner to a small amount of the fuel in the brazier 12 and it operates in substantially the same manner as heretofore.
  • the fixed tube 31 may also be pivoted and operated by a ram or other means as appropriate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP08102279A 2008-03-04 2008-03-04 Brenneranordnung Withdrawn EP2098780A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08102279A EP2098780A1 (de) 2008-03-04 2008-03-04 Brenneranordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08102279A EP2098780A1 (de) 2008-03-04 2008-03-04 Brenneranordnung

Publications (1)

Publication Number Publication Date
EP2098780A1 true EP2098780A1 (de) 2009-09-09

Family

ID=39730676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08102279A Withdrawn EP2098780A1 (de) 2008-03-04 2008-03-04 Brenneranordnung

Country Status (1)

Country Link
EP (1) EP2098780A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012018A (zh) * 2010-06-13 2011-04-13 山东圣威新能源有限公司 一种利用外界可燃废气的锅炉
EP2940383A1 (de) * 2014-04-30 2015-11-04 Warmflow Engineering Company Limited Holzpelletkessel
CN107477567A (zh) * 2017-07-26 2017-12-15 北京巨星新能源科技有限公司 一种生物质散料气化燃烧室装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB278554A (en) 1926-12-24 1927-10-13 Camelon Iron Company Ltd Improvements in domestic fire grates
GB281461A (en) 1926-11-11 1927-12-08 Edgar Russell Improved means of lighting coal, coke or other fuel fires
US1842227A (en) * 1927-12-24 1932-01-19 Sulzer Ag Ignition device for use with fire grates burning solid fuels
GB502192A (en) 1937-10-11 1939-03-14 Alexander Macdonald Rouse Improvements in or relating to gas-fired devices for lighting coal or coke fires
JPS588907A (ja) 1981-07-08 1983-01-19 Shinsaku Goto 風呂釜燃焼装置
JPS58184420A (ja) * 1982-04-22 1983-10-27 Hitachi Zosen Corp 可燃性粉体のダストバ−ナ−燃焼方法
CA1168516A (fr) * 1981-10-13 1984-06-05 Desjardins Lamontagne, Alice Fournaise a dechets de bois
FR2733303A1 (fr) * 1995-04-19 1996-10-25 Gaz De France Chaudiere-incinerateur de dechets et procede de fonctionnement d'une chaudiere-incinerateur de dechets
JP2005009768A (ja) 2003-06-19 2005-01-13 Yamamoto Co Ltd ペレットストーブの点火装置
DE202006002349U1 (de) * 2006-02-15 2006-08-31 Dusel, Anton Hochhitzebeständige Ofenbauteile
GB2446954A (en) * 2007-02-22 2008-08-27 Alley Enterprises Ltd A Burner Assembly

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB281461A (en) 1926-11-11 1927-12-08 Edgar Russell Improved means of lighting coal, coke or other fuel fires
GB278554A (en) 1926-12-24 1927-10-13 Camelon Iron Company Ltd Improvements in domestic fire grates
US1842227A (en) * 1927-12-24 1932-01-19 Sulzer Ag Ignition device for use with fire grates burning solid fuels
GB502192A (en) 1937-10-11 1939-03-14 Alexander Macdonald Rouse Improvements in or relating to gas-fired devices for lighting coal or coke fires
JPS588907A (ja) 1981-07-08 1983-01-19 Shinsaku Goto 風呂釜燃焼装置
CA1168516A (fr) * 1981-10-13 1984-06-05 Desjardins Lamontagne, Alice Fournaise a dechets de bois
JPS58184420A (ja) * 1982-04-22 1983-10-27 Hitachi Zosen Corp 可燃性粉体のダストバ−ナ−燃焼方法
FR2733303A1 (fr) * 1995-04-19 1996-10-25 Gaz De France Chaudiere-incinerateur de dechets et procede de fonctionnement d'une chaudiere-incinerateur de dechets
JP2005009768A (ja) 2003-06-19 2005-01-13 Yamamoto Co Ltd ペレットストーブの点火装置
DE202006002349U1 (de) * 2006-02-15 2006-08-31 Dusel, Anton Hochhitzebeständige Ofenbauteile
GB2446954A (en) * 2007-02-22 2008-08-27 Alley Enterprises Ltd A Burner Assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012018A (zh) * 2010-06-13 2011-04-13 山东圣威新能源有限公司 一种利用外界可燃废气的锅炉
EP2940383A1 (de) * 2014-04-30 2015-11-04 Warmflow Engineering Company Limited Holzpelletkessel
US10036554B2 (en) 2014-04-30 2018-07-31 Warmflow Engineering Company Limited Wood pellet boiler
GB2525629B (en) * 2014-04-30 2018-08-01 Warmflow Engineering Company Ltd Improved wood pellet boiler access door and burner assembly
CN107477567A (zh) * 2017-07-26 2017-12-15 北京巨星新能源科技有限公司 一种生物质散料气化燃烧室装置

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