EP3078910B1 - Gasbrenner mit gestufter verbrennung - Google Patents

Gasbrenner mit gestufter verbrennung Download PDF

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Publication number
EP3078910B1
EP3078910B1 EP15162738.7A EP15162738A EP3078910B1 EP 3078910 B1 EP3078910 B1 EP 3078910B1 EP 15162738 A EP15162738 A EP 15162738A EP 3078910 B1 EP3078910 B1 EP 3078910B1
Authority
EP
European Patent Office
Prior art keywords
gas
primary head
nozzles
gas burner
combustion
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.)
Active
Application number
EP15162738.7A
Other languages
English (en)
French (fr)
Other versions
EP3078910A1 (de
Inventor
Pavel Skryja
Petr Belohradsky
Karel Pleha
Lubomir Vitek
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.)
Pbs Power Equipment SRO
Vysoke Uceni Technicke V Brne
Original Assignee
Pbs Power Equipment SRO
Vysoke Uceni Technicke V Brne
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.)
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Publication date
Application filed by Pbs Power Equipment SRO, Vysoke Uceni Technicke V Brne filed Critical Pbs Power Equipment SRO
Priority to EP15162738.7A priority Critical patent/EP3078910B1/de
Publication of EP3078910A1 publication Critical patent/EP3078910A1/de
Application granted granted Critical
Publication of EP3078910B1 publication Critical patent/EP3078910B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/20—Burner staging
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/30—Staged fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air

Definitions

  • the invention concerns a gas burner with a combustion head with axial main performance nozzles, which is arranged in the axis of a cylindrical casing which is open from below for the flow of the combustion air, wherein there are other fuel nozzles arranged on the output of the casing, wherein in front of the primary head, the fuel tube is divided into a plurality of tubes arranged in a circle, whose nozzles are orientated into the gas burner output.
  • Gas burners are designed for combustion of gaseous fuels and serve primarily as a source of heat for overpressure and underpressure hot water boilers. However, they can be used for other appliances with adequate space for combustion which will not be stressed by external heat. Structurally these gas burners are designed as monobloc, i.e. the swirler and all components are part of the gas burner body. The gas burner operation is fully automatic, also suitable for unattended control of boiler rooms.
  • block burners belong to burners without premixing of gas with air. The mixing takes place until the gas burner output while simultaneous combusting the created mixture. According to the combustion method, block burners belong to burners with free flame.
  • gas burners are provided with a combustion head, which combusts the fuel in one step.
  • combustion temperature peaks occur, which cause creating of thermal NO x .
  • This combustion process does not enable to reduce NO x emissions sufficiently.
  • the aim of this invention is to reduce emissions of thermal NO x .
  • a burner is presented where a primary head is provided with a swirler and in front of the swirler in the direction of the gas burner output, radial stabilization nozzles around the circumference of the head are provided.
  • There are two streams of fuel - an inner one within the inner tube and an outer one in the space between inner and outer tubes. Each stream has its own nozzles, axial respectively radial ones.
  • the aim of the invention is to present a gas burner which would allow to reduce emissions of thermal NO x .
  • Fig. 1 shows a front view of the gas burner according to the invention
  • Fig. 2 is a sectional view of the gas burner opening according to line A-A of Fig. 1 in the scale 1:2
  • Fig. 3 is a sectional view of a gas burner according to line B-B of Fig. 2 .
  • the gas burner consists of a gaseous part which consists of the gas supply 7 tube, an elbow 8 and an income tube portion 9. There is also a not shown air box in front of the gaseous part.
  • the income tube portion 9 leads into a gas distributor 16 from which a tube portion 11 extends on which a reduction piece 12 is arranged.
  • the primary head 15 is provided with a radially arranged swirler 13 on its lateral surface.
  • the reduction piece 12 is provided with a passing-through opening 17 which reduces passing of gas.
  • axial main performance nozzles 19 and stabilization nozzles 20 on its cylindrical casing, namely in front of the swirler 13, viewed from a gas burner output.
  • Secondary gas is supplied from a gas distributor 16 into secondary heads 6 via distribution tubes 10.
  • the cylindrical casing 3 At the ends of outer walls 21 of the distribution tubes 10 there is perpendicularly arranged the cylindrical casing 3, creating the primary combustion channel.
  • the gas is distributed from a ring 22 consisting of a rear wall 4, a longitudinal wall 2 and a front wall 23 by six tubes 5 to six secondary heads 6 with nozzles 18. Where there is no tube 5, there is the front wall 23 which closes the ring 22.
  • Gas-air mixture of the first (primary) stage is formed by the swirler 13 of the central primary head 15.
  • the system of nozzles 19, 20 of the primary head 15 is formed in such a way that a part of these nozzles, namely the axial nozzles +9 are main performance nozzles 19 and the other nozzles are stabilization nozzles 20, which secure combustion stability.
  • the radial stabilization nozzles 20 create turbulent swirling of the gas/air mixture. Their placement in the vicinity of swirler 13 is important because of streaming of the combustion air, which has a lower velocity in this area. In this way a very stable area of flame is created, which lights up and stabilizes the performance nozzles 19.
  • the secondary section has six secondary heads 6 placed around the outer circumference of the casing 3 forming the flame tube. The secondary gas flows radially from the nozzles in secondary heads 6 and enters the gas-air mixture.
  • the first stage is the combustion in the flame tube with huge surplus of combustion air.
  • the first stage has an output of about 20%.
  • the remaining gas needed for a specific power output is combusted in a mode with surplus of air, ideally in the range of 1.05 to 1.2 times of the stoichiometric ratio.
  • the swirler 13 creates turbulent air flow before mixing of the oxidizer with fuel. Turbulent air flow ensures a perfect mixing with fuel.
  • the secondary section has six secondary heads placed around the outer circumference of the inner flame tube. The secondary gas flows radially from the nozzles and does not create a rotary motion. Gas distribution is realized by the distribution ring 22 into which gas flows through two income tubes 8. NO x emissions in this arrangement are at the level of about 25 ppm in the combustion products.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Claims (1)

  1. Gasbrenner beinhaltend
    • ein zylindrisches Gehäuse (3), das von unten für den Eintritt von der Verbrennungsluft offen ist;
    • ein primärer Brennerkopf (15) mit axialen Hauptbrennstoffdüsen (19), der in der Axis von dem zylindrisches Gehäuse (3) angeordnet ist;
    • eine Zuführungsrohr (9) vor dem primären Brennerkopf (15), die in mehrere Rohre (5) verteilt ist, die ins Kreis angeordnet ist
    • ein Gasverteiler (16), wobei die Zuführungsrohr (9) in den Gasverteiler (16) führt
    • Rohrstück (11) der vom Gasverteiler (16) zum primären Brennerkopf (15) führt
    • weitere Brennstoffdüsen (18) die auf mehreren Rohren (5)
    - und auf dem zylindrischen Gehäuseaustritt angeordnet sind, und
    - die in den Austritt aus dem Gasbrenner orientiert sind
    • ein Wirbel (13), wobei der primäre Brennerkopf (15) mit einem Wirbel (13) ausgestattet ist
    • radiale Stabisationsdüsen (20) auf dem Umfang des primären Brennerkopfes (15), die vor dem Wirbel (13) in Richtung des Austritts aus dem Gasbrenner durgeführt sind;
    • ein Reduktionsstück (12)
    - der auf dem Rohrstück (11) der zum Gasverteiler (16) zum primären Brennerkopf (15) führt, angeordnet ist, und
    - mit einer durchgehenden Öffnung (17) versehen ist, welche kleiner als die Öffnung von dem Rohrstück (11) ist und
    • wo der primäre Brennerkopf (15) auf dem Reduktionsstück (12) angeordnet ist.
EP15162738.7A 2015-04-08 2015-04-08 Gasbrenner mit gestufter verbrennung Active EP3078910B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15162738.7A EP3078910B1 (de) 2015-04-08 2015-04-08 Gasbrenner mit gestufter verbrennung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15162738.7A EP3078910B1 (de) 2015-04-08 2015-04-08 Gasbrenner mit gestufter verbrennung

Publications (2)

Publication Number Publication Date
EP3078910A1 EP3078910A1 (de) 2016-10-12
EP3078910B1 true EP3078910B1 (de) 2020-02-12

Family

ID=52813996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15162738.7A Active EP3078910B1 (de) 2015-04-08 2015-04-08 Gasbrenner mit gestufter verbrennung

Country Status (1)

Country Link
EP (1) EP3078910B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020118325A1 (de) 2020-07-10 2022-01-13 Elco Burners Gmbh Verfahren zur gestuften verbrennung eines brennstoffes und brennkopf

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655002B (zh) * 2017-10-20 2024-04-02 烟台龙源电力技术股份有限公司 燃气配风器
CN113188121B (zh) * 2021-04-01 2022-11-04 东方电气集团东方锅炉股份有限公司 一种超低氮燃烧器喷口、燃烧器和锅炉

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505666A (en) 1981-09-28 1985-03-19 John Zink Company Staged fuel and air for low NOx burner
DE3276191D1 (en) * 1981-09-28 1987-06-04 Zink Co John Method and apparatus for burning fuel in stages
DE60308071T3 (de) 2002-01-31 2012-10-25 Air Products And Chemicals, Inc. Brenner für Prozessheizung mit sehr niedrigem NOx Ausstoss
DE102005038110A1 (de) * 2005-08-11 2007-03-01 Lbe Feuerungstechnik Gmbh Industriebrenner und Verfahren zum Betreiben eines Industriebrenners

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020118325A1 (de) 2020-07-10 2022-01-13 Elco Burners Gmbh Verfahren zur gestuften verbrennung eines brennstoffes und brennkopf

Also Published As

Publication number Publication date
EP3078910A1 (de) 2016-10-12

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