EP3078910A1 - Gasbrenner mit gestufter verbrennung - Google Patents

Gasbrenner mit gestufter verbrennung Download PDF

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Publication number
EP3078910A1
EP3078910A1 EP15162738.7A EP15162738A EP3078910A1 EP 3078910 A1 EP3078910 A1 EP 3078910A1 EP 15162738 A EP15162738 A EP 15162738A EP 3078910 A1 EP3078910 A1 EP 3078910A1
Authority
EP
European Patent Office
Prior art keywords
gas burner
nozzles
gas
primary head
head
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.)
Granted
Application number
EP15162738.7A
Other languages
English (en)
French (fr)
Other versions
EP3078910B1 (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
Pbs Power Equipment S R O
Vysoke Uceni Technicke V Brne
Original Assignee
Pbs Power Equipment SRO
Pbs Power Equipment S R O
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.)
Filing date
Publication date
Application filed by Pbs Power Equipment SRO, Pbs Power Equipment S R O, 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 the 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 discharge.
  • Gas burners are designed to 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 combustion of the created mixture. According to the combustion method, block burners belong to burners with free flame.
  • gas burners provided with a combustion head, which combusts the fuel in one step.
  • temperature peaks 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 .
  • the aim of invention is to present a gas burner, which would allow to reduce emissions of thermal NO x .
  • the abbove mentioned disagvantages are eleminated by thw gas burner according to the invention, which principles consists especially in that on the tube portion leading from the gas distributor to the central primary head a reduction piece is arranged, provided with a passing-through opening which is smaller than the opening in the tube portion, and on the reduction piece the primary head is arranged provided with the 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.
  • 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 extends a tube portion 11 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.
  • the primary head 15 On the front of the primary head 15 there are provided 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. At the ends of outer walls 21 of 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 is no tube 5, there is the front wall 23 which closes the ring 22. There is a collar 14 above the front wall 23.
  • Fig. 1 and 3 the construction of the gas burner parts is illustrated from other view.
  • 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 19 are main performance nozzles and the other nozzles 20 are stabilization nozzles, which secure combustion stability.
  • Radial 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 in this area lower velocity. In this way a very stable area of flame is created, which lights up and stabilize 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 nozzels 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 second stage remaining gas needed for a specific power output in a mode with surplus of air, ideally in the range of 1.05 to 1.2 times of the stoichiometric ratio is combusted.
  • 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 throgh two income tube 8. NO x emissions in this arrangement are at the level of about 25 ppm / Nm 3 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)
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 true EP3078910A1 (de) 2016-10-12
EP3078910B1 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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655002A (zh) * 2017-10-20 2018-02-02 烟台龙源电力技术股份有限公司 燃气配风器
CN113188121A (zh) * 2021-04-01 2021-07-30 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
EP3940293A1 (de) * 2020-07-10 2022-01-19 ELCO Burners GmbH Verfahren zur gestuften verbrennung eines brennstoffes und brennkopf

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076036A1 (de) * 1981-09-28 1983-04-06 John Zink Company Verfahren und Vorrichtung zum Verbrennen von Brennstoff in Stufen
US4505666A (en) 1981-09-28 1985-03-19 John Zink Company Staged fuel and air for low NOx burner
EP1335163A1 (de) 2002-01-31 2003-08-13 Air Products And Chemicals, Inc. Brenner für Prozessheizung mit sehr niedriger NOx Emission
WO2007017056A1 (en) * 2005-08-11 2007-02-15 Elster Gmbh Industrial burner and method for operating an industrial burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076036A1 (de) * 1981-09-28 1983-04-06 John Zink Company Verfahren und Vorrichtung zum Verbrennen von Brennstoff in Stufen
US4505666A (en) 1981-09-28 1985-03-19 John Zink Company Staged fuel and air for low NOx burner
EP1335163A1 (de) 2002-01-31 2003-08-13 Air Products And Chemicals, Inc. Brenner für Prozessheizung mit sehr niedriger NOx Emission
WO2007017056A1 (en) * 2005-08-11 2007-02-15 Elster Gmbh Industrial burner and method for operating an industrial burner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655002A (zh) * 2017-10-20 2018-02-02 烟台龙源电力技术股份有限公司 燃气配风器
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
EP3940293A1 (de) * 2020-07-10 2022-01-19 ELCO Burners GmbH Verfahren zur gestuften verbrennung eines brennstoffes und brennkopf
CN113188121A (zh) * 2021-04-01 2021-07-30 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
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

Also Published As

Publication number Publication date
EP3078910B1 (de) 2020-02-12

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