EP3364105A1 - Brûleur pour combustibles à faible pouvoir calorifique - Google Patents

Brûleur pour combustibles à faible pouvoir calorifique Download PDF

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Publication number
EP3364105A1
EP3364105A1 EP17156516.1A EP17156516A EP3364105A1 EP 3364105 A1 EP3364105 A1 EP 3364105A1 EP 17156516 A EP17156516 A EP 17156516A EP 3364105 A1 EP3364105 A1 EP 3364105A1
Authority
EP
European Patent Office
Prior art keywords
burner
whirler
fuel
supply pipe
burner 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
EP17156516.1A
Other languages
German (de)
English (en)
Other versions
EP3364105B1 (fr
Inventor
Pavel Skryja
Igor Hudak
Petr Belohradsky
Petr Stehlik
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.)
VUT V BRNE
Vysoke Uceni Technicke V Brne
Original Assignee
VUT V BRNE
Vysoke Uceni Technicke V Brne
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Publication date
Application filed by VUT V BRNE, Vysoke Uceni Technicke V Brne filed Critical VUT V BRNE
Priority to EP17156516.1A priority Critical patent/EP3364105B1/fr
Publication of EP3364105A1 publication Critical patent/EP3364105A1/fr
Application granted granted Critical
Publication of EP3364105B1 publication Critical patent/EP3364105B1/fr
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
    • 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
    • F23D2900/14002—Special features of gas burners of premix or non premix types, specially adapted for the combustion of low heating value [LHV] gas

Definitions

  • the invention relates to combustion of low calorific fuels from alternative sources and also from standardised sources
  • Burners for combustion of low calorific fuels has to be designed to be able to cope with variable parameters of fuel.
  • Composition of fuel varies according to the process from which it comes and how it was obtained.
  • various incombustible components can occur, most often these are carbon dioxide especially by biofuels or nitrogen, which gets into fuel generally during fuelification of solids by the air.
  • the instable concentration of inert substances also the composition of combustible components can fluctuate, mostly methane, hydrogen, carbon monoxide.
  • the properties of methane, hydrogen, and carbon monoxide are significantly different. They have different weight, calorific value, and also combustion velocity.
  • the combustion velocity is absolutely crucial and has to be considered by designing of the burner.
  • the construction has to be designed so, that it is possible to satisfy various operating conditions.
  • natural fuel is often used, which has significantly higher calorific value than low calorific fuels.
  • the fuel is supplied by central tube, to which further technical elements are attached.
  • These may be various types of whirlers or parts which ensure mixing of individual components, it means fuel and combustion air.
  • the solutions according to prior art utilise the in steps supply of the fuel or air and solve the distribution and mixing of individual flows in different ways.
  • the burner described in the document US2016238241 (A1 ) is intended to combustion of lean fuel, it means low calorific fuel (for example synthetic fuel resulting from the fuelification of biomass).
  • the construction of the burner utilizes two-stage air supply to achieve enlargement of the flame and a favourable distribution of temperature field.
  • the burner is provided with central fuel supply, into which quality fuel through four openings can be mixed in order to increase calorific value or for support of the stability. With the expanding burner on the output, the combustion air is gradually blended into the flame.
  • the device described in US2008299506 (A1 ) is a metallurgical burner primarily designed for burning of low calorific fuels.
  • the burner has a central pipe for air supply, around which a fuel supply pipe is arranged. From outer direction secondary air is fed, so that all the fuel is burnt out.
  • a whirler creating turbulant flow is placed. It is possible to modify the whirler according to used fuel, especially according to its calorific value.
  • WO2007012755 (A1 ) describes symmetric burner. Along the central axis individual flows of substances are gradually fed. Through the central tube fuel is supplied, from which a part is separated, and before burning is mixed with the air in a special chamber. A perforated whirler which has conical shape is placed at the end of the central tube, in order to put the fuel into direction. Premixed mixture flows from the chamber through nozzles directly to burning flame. Secondary air is fed from the outside end using whirling element is directed to achieve its rotation and mixing,
  • the document EP 1 436 546 discloses a burner which utilises the co-stream arrangement of the fuel and the air.
  • the feature of the burner is a conical extension ending with circular array of nozzles which are directed to the central surface.
  • Several types of assembly geometry with different mixing ratios and different influence on turbulent flow are proposed.
  • the aim of the invention is to present a burner assembly for low calorific fuels which would ensure sufficient stability of the flame and which would also eliminate undesired critical conditions arising during its operation when disruption of the flame or fire penetration into the burner body occurrs.
  • the burner head for low calorific fuels which is characterized by the fact that in the front face of the central burner tube, a support tube is fixed, is fixed, on which a burner head (4) at the burner's output is mounted, the burner head is provided with nozzles arranged in a circle near to the inner perimeter of the burner head and forming the primary stage of the burner, and further the burner head is provided with angled grooves on the outer perimeter, which form the secondary stage of the burner, and further the whirler with its inner perimeter is arranged onto central burner tube at its outlet end and the whirler's surface has conical geometry extending outwardly and the whirler's surface openings arranged in a circle are provided.
  • openings on the whirler arranged in three concentric circular rows.
  • the fuel supply pipe provided on the wall with weld-on sleeve for connection of the pressure gauge or other measuring device.
  • Fig.1 is a longitudinal cross-section of built-in burner assembly according to the invention with arrangement of individual parts
  • Fig 2 represents side view of the burner according to the invention in the direction of media flow
  • Fig. 3 represents a detail of the burner head in a perspective view
  • Fig. 4 represents a detail of the whirler of combustion air according to the invention in a perspective view.
  • a longitudinal section of built-in burner assembly can be seen, which consists of a fuel supply pipe 8 provided with connecting flange 10, through which the fuel F enters in the direction of the arrow. Further is the fuel supply pipe 8 attached to a central burner tube 5 which has a front face 6 on the side of the supply pipe 8, which has an opening in the middle to allow insertion of a support tube 7.
  • the whole burner is not displayed, only its built-in assembly.
  • To the central burner tube 5, at its output end is, via weld-on reduction 3, with its inner perimeter 15 a whirler 2 attached.
  • the fuel F flows in the direction of the arrow into space, which has a shape of a hollow cylinder, formed by the central burner tube 5 and the support tube 7.
  • This cylindrical space has such a specific length, so that the previous turbulent flow is maximally stabilised.
  • the stabilisation contributes to the uniform distribution of the fuel inside the cylindrical space and the fuel is then uniformly burnt out.
  • the support tube 7 can be used for addition of an atomiser (not shown) for liquid fuel. At the free end of the support tube 7, screws 12 for aretation of such atomiser are situated.
  • a groove on the burner output is milled into which a burner head 4 is inserted and welded-on, through which the fuel is distributed into combustion space.
  • a weld-on sleeve 11 is located for connection of pressure gauge or other measuring device, which can be seen in Fig. 2 .
  • a shutter is possible to insert in order to regulate pressure on the desired level.
  • Fig.3 the burner head 4 in perspective view is shown.
  • the fuel F flowing through the burner head 4 via nozzles 13, which are spaced in a circle at the inner perimeter forming the primary stage of the burner 1, is distributed uniformly along the central axis of the burner 1. This flow is important especially for the flame core stabilisation. In a stable situation in the flame core the flame envelope can be provided in a high rotational mode without disruption of the flame or unstable combustion.
  • Burner head 4 is at its outer perimeter further provided with angled grooves 14, which change the momentum direction of flowing fuel and form the secondary stage of the burner 1.
  • the fuel gets after passing through the angled grooves 14 into tangential rotation along the central axis of the burner 1. Rotational flow causes better mixing of the fuel with the combustion air A, which arrives to the end of central burner tube 5 and simultaneously the flame is partially attached to the burner head 4.
  • whirler 2 in perspective view is shown, its wall 16 has conical geometry extending outwardly from the burner, which has a positive effect on the flow.
  • the angle of inclination of the wall 16 of the whirler 2 has an important role, since due to this inclination it is possible to direct partially the airflow, to direct it towards the centre of the flame, and causing a complete combustion.
  • the burner head 4 has defined number of nozzles 13 arranged in a circle, whereas the number and size of nozzles 13 is determined based on the requirements for maximum performance, according to which the dimensions are determined so, that the requested amount of fuel flows through the primary stage created in this way.
  • the number, width, and depth of angled grooves 14 are determined as to allow the remaining fuel to flow through these grooves at maximum power and the groove 14 inclination angle is determined relative to the plane of the burner head 4 in such a way, to ensure optimal turbulent flow in a tangential direction.
  • the burner is intended for combustion of different types of low calorific fuels, also from other alternative devices, such as fuelifiers.
  • Built-in burner assembly is applicable in plants, where waste fuels occurs, whose energy is let unused in burners with flaring and flue gases are emitted without use into the atmosphere.
  • Another area where it is possible to use the burner are biogas plants and heat sources connected thereto.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)
EP17156516.1A 2017-02-16 2017-02-16 Brûleur pour combustibles à faible pouvoir calorifique Active EP3364105B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17156516.1A EP3364105B1 (fr) 2017-02-16 2017-02-16 Brûleur pour combustibles à faible pouvoir calorifique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17156516.1A EP3364105B1 (fr) 2017-02-16 2017-02-16 Brûleur pour combustibles à faible pouvoir calorifique

Publications (2)

Publication Number Publication Date
EP3364105A1 true EP3364105A1 (fr) 2018-08-22
EP3364105B1 EP3364105B1 (fr) 2019-11-27

Family

ID=58054067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17156516.1A Active EP3364105B1 (fr) 2017-02-16 2017-02-16 Brûleur pour combustibles à faible pouvoir calorifique

Country Status (1)

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EP (1) EP3364105B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4345373A1 (fr) * 2022-09-28 2024-04-03 Honeywell International Inc. Dispositif de mélange carburant-air et de stabilisation de flamme pour un brûleur à faible émission avec recirculation interne des gaz de combustion

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368605A (en) * 1966-02-03 1968-02-13 Zink Co John Burner assembly for lean fuel gases
US4281983A (en) * 1979-04-06 1981-08-04 John Zink Company Premix burner system for low BTU gas fuel
EP0487700B1 (fr) 1990-06-15 1996-11-27 Lanemark Limited Ameliorations relatives a des bruleurs
EP1436546A1 (fr) 2001-10-19 2004-07-14 ALSTOM (Switzerland) Ltd Bruleur a gaz de synthese
WO2007012755A1 (fr) 2005-07-26 2007-02-01 Optimise Procédé et installation de combustion de gaz combustible pauvre, sans soutien, à l'aide d'un brûleur et brûleur associé
US20080299506A1 (en) 2007-05-29 2008-12-04 Bernhard Zimmermann Metallurgical Gas Burner
US20130036741A1 (en) * 2010-11-24 2013-02-14 Delavan Inc Multipoint injectors with auxiliary stage
WO2014024153A1 (fr) * 2012-08-07 2014-02-13 Sacmi Forni S.P.A. Appareil de combustion à récupération de chaleur, en particulier pour fours en céramique
WO2014204333A1 (fr) 2013-06-17 2014-12-24 Schlumberger Canada Limited Assemblage de brûleur pour le brûlage à la torche de gaz à faible pouvoir calorifique
US20160238241A1 (en) 2013-10-14 2016-08-18 Cogebio Lean gas burner

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368605A (en) * 1966-02-03 1968-02-13 Zink Co John Burner assembly for lean fuel gases
US4281983A (en) * 1979-04-06 1981-08-04 John Zink Company Premix burner system for low BTU gas fuel
EP0487700B1 (fr) 1990-06-15 1996-11-27 Lanemark Limited Ameliorations relatives a des bruleurs
EP1436546A1 (fr) 2001-10-19 2004-07-14 ALSTOM (Switzerland) Ltd Bruleur a gaz de synthese
WO2007012755A1 (fr) 2005-07-26 2007-02-01 Optimise Procédé et installation de combustion de gaz combustible pauvre, sans soutien, à l'aide d'un brûleur et brûleur associé
US20080299506A1 (en) 2007-05-29 2008-12-04 Bernhard Zimmermann Metallurgical Gas Burner
US20130036741A1 (en) * 2010-11-24 2013-02-14 Delavan Inc Multipoint injectors with auxiliary stage
WO2014024153A1 (fr) * 2012-08-07 2014-02-13 Sacmi Forni S.P.A. Appareil de combustion à récupération de chaleur, en particulier pour fours en céramique
WO2014204333A1 (fr) 2013-06-17 2014-12-24 Schlumberger Canada Limited Assemblage de brûleur pour le brûlage à la torche de gaz à faible pouvoir calorifique
US20160238241A1 (en) 2013-10-14 2016-08-18 Cogebio Lean gas burner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4345373A1 (fr) * 2022-09-28 2024-04-03 Honeywell International Inc. Dispositif de mélange carburant-air et de stabilisation de flamme pour un brûleur à faible émission avec recirculation interne des gaz de combustion

Also Published As

Publication number Publication date
EP3364105B1 (fr) 2019-11-27

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