SE520310C2 - Burner for biofuel pellets or chips - Google Patents

Burner for biofuel pellets or chips

Info

Publication number
SE520310C2
SE520310C2 SE9703478A SE9703478A SE520310C2 SE 520310 C2 SE520310 C2 SE 520310C2 SE 9703478 A SE9703478 A SE 9703478A SE 9703478 A SE9703478 A SE 9703478A SE 520310 C2 SE520310 C2 SE 520310C2
Authority
SE
Sweden
Prior art keywords
air
chamber
combustion chamber
combustion
fuel
Prior art date
Application number
SE9703478A
Other languages
Swedish (sv)
Other versions
SE9703478D0 (en
SE9703478L (en
Inventor
Jan-Aake Gullaksen
Original Assignee
Kmp Kalmar Maskinprojekt Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20408383&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE520310(C2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kmp Kalmar Maskinprojekt Ab filed Critical Kmp Kalmar Maskinprojekt Ab
Priority to SE9703478A priority Critical patent/SE520310C2/en
Publication of SE9703478D0 publication Critical patent/SE9703478D0/en
Publication of SE9703478L publication Critical patent/SE9703478L/en
Publication of SE520310C2 publication Critical patent/SE520310C2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/02—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs for igniting solid fuel
    • F23Q7/04—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs for igniting solid fuel with fans for transfer of heat to fuel
    • 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
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/16—Over-feed arrangements
    • 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
    • F23L1/00—Passages or apertures for delivering primary air for combustion 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B2103/00—Adaptation of combustion apparatus for placement in or against an opening of a boiler, e.g. for replacing an oil burner
    • F23B2103/02—Adaptation of combustion apparatus for placement in or against an opening of a boiler, e.g. for replacing an oil burner for producing an essentially horizontal flame

Landscapes

  • 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)

Abstract

Fuel is added to a horizontal combustion chamber via a feed shaft, which contains a pin glowing red hot positioned close to the rear end wall of the shaft near the base of the chamber. Some combustion air is introduced into the chamber close to the pin, some primary combustion air is introduced through the bottom of the chamber close to the rear end wall of the shaft, and some secondary combustion air is introduced through the bottom and entrance of the chamber further away from the shaft. An air outlet is present to keep the fuel supply pipe cool.

Description

520 310 En pelletsbrännare enligt uppfinningen beskrivs närmare i en föredragen utförandeform med hänvisning till bifogad figur 1. Figuren visar brännaren i ett vertikalt snitt. 520 310 A pellet burner according to the invention is described in more detail in a preferred embodiment with reference to the attached figure 1. The figure shows the burner in a vertical section.

Brännaren har en tryckkammare 1, som matas med förbrän- ningsluft från en fläkt 2. Till tryckkammaren l är en yttre brännarmantel 3 ansluten. Brännarmanteln 3 omsluter en brännkammare 4 med längden L och största tvärsnitts- mått D och som är förbunden med en kammare 5 för bräns- leinmatning till brännkammaren 4. Inmatningsledningen 6 mynnar i bränsleinmatningskammarens 5 övre del 7, som är utformad som ett fallschakt för pellets. På bränslein- matningskammarens 5 bakre vägg 8 är ett glödstift 9 inbyggt nära botten av brännkammaren 4.The burner has a pressure chamber 1, which is supplied with combustion air from a fan 2. An outer burner jacket 3 is connected to the pressure chamber 1. The burner jacket 3 encloses a combustion chamber 4 with length L and largest cross-sectional dimension D and which is connected to a chamber 5 for fuel supply to the combustion chamber 4. The feed line 6 opens into the upper part 7 of the fuel feed chamber 5, which is designed as a drop shaft for pellets. On the rear wall 8 of the fuel supply chamber 5, a glow plug 9 is built in near the bottom of the combustion chamber 4.

I bränsleinmatningskammarens 5 fallschakt 7 har luftintag 10 från tryckkammaren 1 anordnats på så sätt att luftin- strömningen till fallschaktet 7 bildar en ejektor för medryckning av luft från fallschaktet 7 och inmatnings- ledningen 6.In the falling shaft 7 of the fuel supply chamber 5, air inlets 10 from the pressure chamber 1 are arranged in such a way that the air inflow to the falling shaft 7 forms an ejector for entraining air from the falling shaft 7 and the supply line 6.

I övrigt har luftintag från tryckkammaren 1 och den med denna förbundna brännarmanteln 3 till brännkammaren 4 anordnats i fyra grupper, nämligen en grupp luftintag ll runt eller nära glödstiftet 9, en grupp luftintag 12 vid brännkammarens 4 botten nära anslutningen till inmat- ningskammarens 5 bakre vägg 8, en grupp luftintag 13 vid brännkammarens 4 botten, fördelade längs botten fram mot brännkammarens 4 mynning 14 samt slutligen en ring av luftintag 15 fördelade runt omkretsen av brännkammaren 4.Otherwise, air intakes from the pressure chamber 1 and the burner jacket 3 connected thereto to the combustion chamber 4 are arranged in four groups, namely a group of air intakes 11 around or near the glow pin 9, a group of air intakes 12 at the bottom of the combustion chamber 4 near the connection to the rear wall of the feed chamber 5. 8, a group of air intakes 13 at the bottom of the combustion chamber 4, distributed along the bottom towards the mouth 14 of the combustion chamber 4 and finally a ring of air intakes 15 distributed around the circumference of the combustion chamber 4.

På inmatningsledningen 6 har en termostat eller tempera- turbegränsare 16 monterats. 520 310 Vid eldning blir temperaturen i brännkammaren 4 mycket hög, vilket medför att den runtom brännkammaren 4 ström- mande förbränningsluften blir kraftigt förvärmd före inströmningen i luftintagen 12, 13 och 15.A thermostat or temperature limiter 16 has been mounted on the supply line 6. 520 310 During firing, the temperature in the combustion chamber 4 becomes very high, which means that the combustion air flowing around the combustion chamber 4 is strongly preheated before the inflow into the air intakes 12, 13 and 15.

Luften genom luftintagen 12 strömmar igenom den bränsle- bädd som har inmatats på brännkammarens 4 botten och skapar där en första förbränningszon med förgasning av bränslet.The air through the air intakes 12 flows through the fuel bed which has been fed into the bottom of the combustion chamber 4 and creates there a first combustion zone with gasification of the fuel.

Det tunnare bränsleskikt som hamnat längre fram på bränn- kammarens 4 botten tillförs förvärmd förbränningsluft genom de längs brännkammaren 4 fördelade luftintagen 13.The thinner fuel layer which has ended up further forward on the bottom of the combustion chamber 4 is supplied with preheated combustion air through the air intakes 13 distributed along the combustion chamber 4.

Denna förbränningsluft fungerar också som sekundärluft för de gaser som bildats genom förgasning av bränslet längre bak i brännkammaren 4.This combustion air also acts as a secondary air for the gases formed by gasifying the fuel further back in the combustion chamber 4.

Slutligen tillförs den bäst förvärmda förbränningsluften genom luftintagen 15 nära brännkammarens 4 mynning 14 så att man får en god och nära fullständig slutförbränning.Finally, the best preheated combustion air is supplied through the air intakes 15 near the mouth 14 of the combustion chamber 4 so that a good and almost complete final combustion is obtained.

För att få en snabb och säker tändning tillförs luft runt glödstiftet 9 i en serie luftintag ll nära glödstiftet 9.In order to obtain a rapid and safe ignition, air is supplied around the glow pin 9 in a series of air intakes 11 near the glow pin 9.

Alltför hög temperatur på den inkommande bränsleledningen 6 undviks genom kylning av ledningen 6 och fallschaktet 7 med kring dessa strömmande fläktluft och genom ejektorn 10 som ger en kylande luftström genom bränsleledningen 6 riktad in mot brännaren.Skulle bränsledningen 6 ändå bli för varm, exempelvis vid kraftigt mottryck i panna eller rökrör, kan en termostat eller temperaturbegränsare 16 anbringad på bränsleledningen 6 stoppa bränsletillför- seln.Excessive temperature on the incoming fuel line 6 is avoided by cooling the line 6 and the downcomer 7 with fan air flowing around them and through the ejector 10 which provides a cooling air flow through the fuel line 6 directed towards the burner. back pressure in the boiler or flue, a thermostat or temperature limiter 16 mounted on the fuel line 6 can stop the fuel supply.

Den här beskrivna brännaren visar en föredragen form av uppfinningen. Inom ramen för uppfinningstanken kan andra alternativa utföringsformer utarbetas.The burner described herein shows a preferred form of the invention. Within the scope of the inventive concept, other alternative embodiments may be developed.

Claims (2)

520 310 4 PATENTKRAV520 310 4 PATENT REQUIREMENTS 1. Brännare för biobränsle i form av pellets eller flis med fläkt (2) för förbränningsluft, kammare (5) för bränsleinmatning från bränsleledning (6) och en till bränslekammaren (5) ansluten rörformad brännkammare (4) med horisontell eller nära horisontell axel k ä n n e t e c k n a d av att brännkammaren (4) har en längd (L) i flamriktningen som är större än dess största tvärsnittsmått (D) och att förbränningsluft tillföres dels som primärluft till bränslekammaren (5) och dels som sekundärluft som efter förvärmning i utrymmet mellan brännkammaren (4) och en denna omgivande yttermantel (3) tillföres brännkammaren (4) i ett antal längs brännkammarens (4) botten fördelade luftintag (l2,l3) samt i luftintag (15) nära utloppsöppningen (14) fördelade runt brännkammarens (4) omkrets och att ill brännkammaren (4) och bränslekammaren (5) anslutits ett fallschakt (7) för bränslet och att detta fallschakt (7) kyls av en fallschaktet (7) omgivande tryckkammare (1) för förbränningsluft och att fallschaktet (7) försetts med ett eller flera luftintag (10) så utformade att luftströmmen genom luftintagen (10) verkar som sugande ejektor för luft in till fallschaktet (7) genom bränsleledningen (6).Burner for biofuel in the form of pellets or chips with fan (2) for combustion air, chamber (5) for fuel supply from fuel line (6) and a tubular combustion chamber (4) connected to the fuel chamber (5) with horizontal or near horizontal axis k characterized in that the combustion chamber (4) has a length (L) in the flame direction which is greater than its largest cross-sectional dimension (D) and that combustion air is supplied partly as primary air to the fuel chamber (5) and partly as secondary air as after preheating in the space between the combustion chamber ( 4) and an outer jacket (3) surrounding it is supplied to the combustion chamber (4) in a number of air intakes (l2, l3) distributed along the bottom of the combustion chamber (4) and in air intakes (15) near the outlet opening (14) distributed around the circumference of the combustion chamber (4) and that in the combustion chamber (4) and the fuel chamber (5) a downcomer (7) for the fuel is connected and that this downcomer (7) is cooled by a pressure chamber (1) surrounding the combustion shaft (7) for combustion air and that fall the shaft (7) is provided with one or more air inlets (10) so designed that the air flow through the air inlets (10) acts as a suction ejector for air into the downhole (7) through the fuel line (6). 2. Brännare enligt krav 2, k ä n n e t e c k n a d av att fallschaktet (7) vid sin bakre vägg (10) försetts med en elektrisk tändanordning (9) monterad nära brännkammarens (4) botten och med luftintag vid fallschaktets (7) bakre vägg (8) nära tändanordningen (9).Burner according to claim 2, characterized in that the fall shaft (7) is provided at its rear wall (10) with an electric igniter (9) mounted near the bottom of the combustion chamber (4) and with air intake at the rear wall (8) of the fall shaft (7). ) near the igniter (9).
SE9703478A 1997-09-26 1997-09-26 Burner for biofuel pellets or chips SE520310C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9703478A SE520310C2 (en) 1997-09-26 1997-09-26 Burner for biofuel pellets or chips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9703478A SE520310C2 (en) 1997-09-26 1997-09-26 Burner for biofuel pellets or chips

Publications (3)

Publication Number Publication Date
SE9703478D0 SE9703478D0 (en) 1997-09-26
SE9703478L SE9703478L (en) 1999-03-27
SE520310C2 true SE520310C2 (en) 2003-06-24

Family

ID=20408383

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9703478A SE520310C2 (en) 1997-09-26 1997-09-26 Burner for biofuel pellets or chips

Country Status (1)

Country Link
SE (1) SE520310C2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102466241A (en) * 2010-11-09 2012-05-23 农业部规划设计研究院 Automatic ignition method and device for biomass particle fuel
CN103836614A (en) * 2014-03-28 2014-06-04 张崇鑫 Biomass burner
US10670276B2 (en) * 2013-05-02 2020-06-02 Original Pellet Grill Company Llc Double-sealed high-temperature resistant DC ignitor for use with wood pellet burner assemblies
EP4382806A1 (en) * 2022-12-09 2024-06-12 Ludwig Staab Biomass powered radiant heater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102466241A (en) * 2010-11-09 2012-05-23 农业部规划设计研究院 Automatic ignition method and device for biomass particle fuel
US10670276B2 (en) * 2013-05-02 2020-06-02 Original Pellet Grill Company Llc Double-sealed high-temperature resistant DC ignitor for use with wood pellet burner assemblies
CN103836614A (en) * 2014-03-28 2014-06-04 张崇鑫 Biomass burner
EP4382806A1 (en) * 2022-12-09 2024-06-12 Ludwig Staab Biomass powered radiant heater

Also Published As

Publication number Publication date
SE9703478D0 (en) 1997-09-26
SE9703478L (en) 1999-03-27

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