EP0945678A2 - Brûleur à faible taux de NOx pour combustibles liquides et gazeux - Google Patents

Brûleur à faible taux de NOx pour combustibles liquides et gazeux Download PDF

Info

Publication number: EP0945678A2
Authority: EP; European Patent Office
Prior art keywords: primary; swirler; air duct; combustion; burner according
Prior art date: 1998-03-25
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

EP99830162A

Other languages

German (de)

English (en)

Other versions

EP0945678B1 (fr

EP0945678A3 (fr

Inventor

Ferdinando Costanzi

Sergio Ligasacchi

Enrico Tosi

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.)

Enel SpA

Original Assignee

Enel SpA

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.)

1998-03-25

Filing date

1999-03-23

Publication date

1999-09-29

1999-03-23 Application filed by Enel SpA filed Critical Enel SpA

1999-09-29 Publication of EP0945678A2 publication Critical patent/EP0945678A2/fr

2000-01-19 Publication of EP0945678A3 publication Critical patent/EP0945678A3/fr

2003-10-08 Application granted granted Critical

2003-10-08 Publication of EP0945678B1 publication Critical patent/EP0945678B1/fr

2019-03-23 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
- F23D17/002—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel gaseous or 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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
- F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
- 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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/008—Flow control devices

Definitions

the present invention relates to a novel low NOx burner for liquid and gaseous fuel. More precisely the invention relates to a low/medium capacity burner designed to equip steam or hot water generators both for civil purposes (for example remote location heating plants) and for industrial purposes (for example, boilers for steam generation for machinery, industrial laundries, etc.).
Low/medium capacity burners of the prior art are generally comprise a duct for the combustion air, which can be whirled by means of an adjustable radial register or by means of a tangential inlet (volute inlet), and a large perforated and/or finned disk, placed at the outlet of the duct, for the stabilization of the flame.
the burners of this kind are considerably simple in structure and construction, but have a low ability to reduce the nitrogen oxides emissions and very high aerodynamic pressure drops (in the range of several thousands of Pa).
the object of the present invention is to provide a liquid and gaseous fuel burner suitable of performing a stage combustion typical of the "three airs" burners, with all the related advantages in term of reduced NOx production, but with a more simple structure with respect to this type of burners, thus being fit for installation in low/medium capacity steam/hot water generation plants.
the burner of the invention by virtue of the division of the combustion air into two streams, called primary and secondary air stream, as well as of a suitable geometry of the burner outlet and by means of the use of a turbulence generator (primary swirler) on the primary air with a radial flow divider and a controllable turbulence generator (secondary swirler) on the secondary air.
primary swirler turbulence generator
secondary swirler controllable turbulence generator
Primary air duct 11 extends coaxially to liquid fuel lance 6 and houses gas lances 9. It is connected to flange 7 at its outer end and communicates with combustion chamber 4 at the inner one.
a plurality of radial windows 12 for feeding the air from windbox 5 are formed on primary air duct 11 close to flange 7 and a cylindrical damper 13 axially slidable by means of a pair of rods 14 (only one shown in figure 1) extending outside of flange 7 is provided inside primary duct 11 in correspondence to windows 12.
Secondary air duct 17 extends coaxially to primary air duct 11 from a flange 18 radially extending from duct 11 and outflows in combustion chamber 4.
a plurality of radial windows 19 for feeding air from windbox 5 are formed on secondary air duct 17 close to flange 18.
a cylindrical damper 20 axially slidable by means of a pair of rods 21 (only one shown in figure 1) is provided in correspondence to windows 19 on the outer side of secondary air duct 17.
the axial sliding of cylindrical dampers 13 and 20 allows for a continuous adjustment of the respective inlet sections of primary and secondary air ducts and, by this way, the partitioning of the flowrate of the combustion air. The adjustment can be carried out both by manual operation of respective rods 14 and by motorized operation.
the primary and secondary air ducts can be fed either by the same windbox 5, as shown, or by different windboxes.
the section can be varied in a continuous way so as to have an outlet angle of the primary air flow variable with the radius, as shown in figures 3a, 3b, or in a discontinuous way by making each blade of two differently inclined blade-portions connected to each other, as shown in figures 4a, 4b.
Swirler 22 is made axially slidable between two end positions, a first one completely downstream of windows 19 and a second one, shown with discontinuous line in figure 1, completely upstream of windows 19, the sliding of movable swirler 22 being controlled by rods 23 extending outside of flange 7.
the air vorticity can be controlled in such a way that it will be null when swirler 22 is in the backward position, i.e. the second position and the combustion air does not passes through it (fig.5a), medium when the swirler is in the intermediate position (fig.
the vorticity control is obtained by placing the swirler in one of the possible intermediate positions.
a venturi 24 is placed downstream of movable swirler 22 in correspondence to the outlet of secondary air duct 24.
a radial flow divider 25 is arranged at the outlet of secondary air duct 17 in the combustion chamber 4.
the diameter of the flow divider at the outlet of the swirler is equal to the diameter of separation of the annuli defined by the different inclinations of the series of blades.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)

EP99830162A 1998-03-25 1999-03-23 Brûleur à faible taux de NOx pour combustibles liquides et gazeux Expired - Lifetime EP0945678B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
IT98FI000069A ITFI980069A1 (it)	1998-03-25	1998-03-25	Bruciatore innovativo per combustibili liquidi e gassosi a bassa produzione di ossidi di azoto
ITFI980069		1998-03-25

Publications (3)

Publication Number	Publication Date
EP0945678A2 true EP0945678A2 (fr)	1999-09-29
EP0945678A3 EP0945678A3 (fr)	2000-01-19
EP0945678B1 EP0945678B1 (fr)	2003-10-08

Family

ID=11352461

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP99830162A Expired - Lifetime EP0945678B1 (fr)	1998-03-25	1999-03-23	Brûleur à faible taux de NOx pour combustibles liquides et gazeux

Country Status (4)

Country	Link
EP (1)	EP0945678B1 (fr)
AT (1)	ATE251737T1 (fr)
DE (1)	DE69911830D1 (fr)
IT (1)	ITFI980069A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2887597A1 (fr) *	2005-06-27	2006-12-29	Egci Pillard Sa	Conduite annulaire et bruleur comportant une telle conduite
CN100445642C (zh) *	2004-12-06	2008-12-24	北京时代桃源环境科技有限公司	垃圾填埋气燃烧器
EP2378196A1 (fr) *	2010-04-16	2011-10-19	Ammann Italy S.p.A.	Brûleur pour cylindres sécheurs et procédé d'utilisation d'un brûleur pour cylindres sécheurs
CN103185342A (zh) *	2013-04-03	2013-07-03	大唐韩城第二发电有限责任公司	一种油气复合燃烧器
JP2013155917A (ja) *	2012-01-30	2013-08-15	Bab-Hitachi Industrial Co	バーナ装置
CN103256590A (zh) *	2013-05-20	2013-08-21	北京科技大学	旋流状态下双燃料多级混烧的方法及装置
US9388983B2 (en)	2013-10-03	2016-07-12	Plum Combustion, Inc.	Low NOx burner with low pressure drop
WO2020012347A1 (fr) *	2018-07-10	2020-01-16	Siti - B&T Group S.P.A.	Brûleur pour fours industriels, séchoirs et similaires
CN114183754A (zh) *	2020-09-14	2022-03-15	意大利利雅路股份有限公司	燃烧器的燃烧头
CN114198751A (zh) *	2021-11-29	2022-03-18	北京航化节能环保技术有限公司	一种双涵道可调式气液组合燃烧器

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2144098A (en) *	1937-01-06	1939-01-17	Gasoline Prod Co Inc	Apparatus for firing furnaces
US3367385A (en) *	1966-11-29	1968-02-06	Peabody Engineering Corp	Retractible air register
US4201539A (en) *	1978-01-03	1980-05-06	Coen Company, Inc.	Flame forming burner
US4504217A (en) *	1983-10-14	1985-03-12	Zurn Industries, Inc.	Low excess air burner having a movable venturi
GB8331128D0 (en) *	1983-11-22	1983-12-29	Babcock Prod Eng	Axial swirl generators
IT1238713B (it) *	1990-04-20	1993-09-01	Ente Naz Energia Elettrica	Bruciatore perfezionato per olio e gas combustibili a bassa produzione di ossidi di azoto.
DE4133176A1 (de) *	1991-10-07	1993-04-08	Wulff Maschf Appbau Gmbh	Brenner fuer fluessige und/oder gasfoermige brennstoffe
GB2262981B (en) *	1991-12-30	1995-08-09	Ind Tech Res Inst	Dual fuel low nox burner
DE19607676A1 (de) *	1996-02-29	1997-09-11	Steinmueller Gmbh L & C	Brenner und mit mindestens einem Brenner betriebene Feuerungsanlage
EP0836048B1 (fr) *	1996-10-08	2001-08-16	Ansaldo Caldaie S.P.A.	Brûleur

1998
- 1998-03-25 IT IT98FI000069A patent/ITFI980069A1/it unknown
1999
- 1999-03-23 AT AT99830162T patent/ATE251737T1/de not_active IP Right Cessation
- 1999-03-23 DE DE69911830T patent/DE69911830D1/de not_active Expired - Lifetime
- 1999-03-23 EP EP99830162A patent/EP0945678B1/fr not_active Expired - Lifetime

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN100445642C (zh) *	2004-12-06	2008-12-24	北京时代桃源环境科技有限公司	垃圾填埋气燃烧器
FR2887597A1 (fr) *	2005-06-27	2006-12-29	Egci Pillard Sa	Conduite annulaire et bruleur comportant une telle conduite
WO2007000512A1 (fr) *	2005-06-27	2007-01-04	Egci Pillard	Bruleur
CN101208559B (zh) *	2005-06-27	2011-04-06	皮拉德Egci股份公司	燃烧器
US9011141B2 (en)	2005-06-27	2015-04-21	Egci Pillard	Burner
EP2378196A1 (fr) *	2010-04-16	2011-10-19	Ammann Italy S.p.A.	Brûleur pour cylindres sécheurs et procédé d'utilisation d'un brûleur pour cylindres sécheurs
WO2011128865A3 (fr) *	2010-04-16	2011-12-15	Ammann Italy S.P.A.	Brûleur pour cylindres de séchage et procédé d'utilisation d'un brûleur pour cylindres de séchage
JP2013155917A (ja) *	2012-01-30	2013-08-15	Bab-Hitachi Industrial Co	バーナ装置
CN103185342A (zh) *	2013-04-03	2013-07-03	大唐韩城第二发电有限责任公司	一种油气复合燃烧器
CN103185342B (zh) *	2013-04-03	2015-09-30	大唐韩城第二发电有限责任公司	一种油气复合燃烧器
CN103256590B (zh) *	2013-05-20	2015-07-15	北京科技大学	旋流状态下双燃料多级混烧的方法及装置
CN103256590A (zh) *	2013-05-20	2013-08-21	北京科技大学	旋流状态下双燃料多级混烧的方法及装置
US9388983B2 (en)	2013-10-03	2016-07-12	Plum Combustion, Inc.	Low NOx burner with low pressure drop
WO2020012347A1 (fr) *	2018-07-10	2020-01-16	Siti - B&T Group S.P.A.	Brûleur pour fours industriels, séchoirs et similaires
CN114183754A (zh) *	2020-09-14	2022-03-15	意大利利雅路股份有限公司	燃烧器的燃烧头
EP3967924A1 (fr) *	2020-09-14	2022-03-16	Riello S.p.A.	Tête de combustion pour un brûleur
US11841137B2 (en)	2020-09-14	2023-12-12	Riello, S.P.A.	Combustion head for a burner
CN114183754B (zh) *	2020-09-14	2024-04-26	意大利利雅路股份有限公司	燃烧器的燃烧头
CN114198751A (zh) *	2021-11-29	2022-03-18	北京航化节能环保技术有限公司	一种双涵道可调式气液组合燃烧器
CN114198751B (zh) *	2021-11-29	2024-02-09	北京航化节能环保技术有限公司	一种双涵道可调式气液组合燃烧器

Also Published As

Publication number	Publication date
ITFI980069A1 (it)	1999-09-25
ATE251737T1 (de)	2003-10-15
EP0945678B1 (fr)	2003-10-08
ITFI980069A0 (it)	1998-03-25
EP0945678A3 (fr)	2000-01-19
DE69911830D1 (de)	2003-11-13

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Publication	Publication Date	Title
US4479442A (en)	1984-10-30	Venturi burner nozzle for pulverized coal
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