EP2853813B1 - Tête de brûleur - Google Patents

Tête de brûleur Download PDF

Info

Publication number
EP2853813B1
EP2853813B1 EP13466023.2A EP13466023A EP2853813B1 EP 2853813 B1 EP2853813 B1 EP 2853813B1 EP 13466023 A EP13466023 A EP 13466023A EP 2853813 B1 EP2853813 B1 EP 2853813B1
Authority
EP
European Patent Office
Prior art keywords
burner
head
welded
nozzles
gas
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.)
Not-in-force
Application number
EP13466023.2A
Other languages
German (de)
English (en)
Other versions
EP2853813A1 (fr
Inventor
Pavel Skryja
Tomas Jurena
Petr Stehlik
Petr Belohradsky
Jiri Hajek
Andrea Tabasova
Radek Nejezchleb
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.)
Vysoke Uceni Technicke V Brne
Original Assignee
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 Vysoke Uceni Technicke V Brne filed Critical Vysoke Uceni Technicke V Brne
Priority to EP13466023.2A priority Critical patent/EP2853813B1/fr
Priority to PL13466023T priority patent/PL2853813T3/pl
Publication of EP2853813A1 publication Critical patent/EP2853813A1/fr
Application granted granted Critical
Publication of EP2853813B1 publication Critical patent/EP2853813B1/fr
Not-in-force 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
    • 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
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners

Definitions

  • the invention relates to a burner head formed on the primary portion of a gas burner in which gases having different calorific values will be burnt.
  • Gases are commonly burnt by means of gas burner heads and nozzles having diverse constructional arrangements. Such burner heads or nozzles are mostly designed to burn a particular noble gaseous fuel. Besides that, such burner heads do not enable non-noble gases to be burnt, such as by-products from chemical and processing industries or gases originating from alternative sources (e.g. biogas, landfill gas or the like). In most cases, such gases are waste products having low and variable calorific values. Common gas burner heads are not able to ensure a sufficient stability of the burning process when lean gases are burnt and an oversupply of combustion air cannot be avoided. Frequent changes to the combustion conditions, such as varying pressure ratios inside a combustion chamber, cause the flame to extinguish, thus giving rise to hazardous situations. Typical examples include plants operating in a charge mode, waste incineration plants and the like.
  • Document JPH081781224 discloses a burner head according to the preamble of claim 1.
  • JP2008111591 burner head is presented formed by a hollow cylindrical welded-on piece, the bottom internal circumference of the welded-on piece being welded to the outer burner feed pipe and the top internal circumference of the being welded to the inner burner feed pipe, the head being provided with the power nozzles arranged in the area of the bevelled front face.
  • the objective of the invention is to present a gas burner head which will be able to ensure a sufficient stability of the burning process when lean gases are burnt during an oversupply of combustion air.
  • Fig. 1 shows a gas burner with an inner feed pipe of the first combustion stage, the end of the pipe being provided with the burner head according to the invention
  • Fig. 2 shows the burner head in a detailed view.
  • Fig. 1 shows a gas burner with an inner feed pipe of the first combustion stage in a general view, the end of the pipe being provided with the burner head according to the invention.
  • the gas burner 1 consists of the gas supply branch 8, which is provided with the flange 9 at the its inlet end, the outlet end of the gas supply branch 8 leading into the gas distributor.
  • the gas distributor 10 is interconnected with the outer burner feed pipe 7 of the first combustion stage by means of the connecting pipe 17.
  • the connecting pipe 17 is attached to the outer burner feed pipe 7 by means of the pipe union 15.
  • the outer burner feed pipe 7 is supplemented by the inner burner feed pipe 4 made of a refractory material, the latter being inserted in the former and forming an extension of the same.
  • the inner burner feed pipe 4 is coaxial relative to the outer burner feed pipe 7 of the first combustion stage.
  • the common end of the burner feed pipes 4, 7 carries the burner head 22 which is formed by a hollow cylindrical welded-on piece, the bottom internal circumference of the welded-on piece being welded to the outer burner feed pipe 7 and the top internal circumference of the being welded to the inner burner feed pipe 4.
  • Either end of the connecting pipe 17 is provided by one pipe union 15, the first of the latter being connected to the primary gas distributor 10 and the second one being connected to the welded-one branch 14, in which the nozzle 21 for restricting the flow of gas supplied to the burner head 22 is arranged. Furthermore, the feed pipes 12 of the second combustion stage are visible, which are connected to the respective pipe of the gas distributor 10 by means of the pipe union 11.
  • the gas distributor 10 is provided with one inlet formed by the gas supply branch 8, one outlet leading to the first gas stage and formed by the connecting pipe 17 and three outlets leading to the second gas stage and formed by the feed pipes 12, of which only one is visible in Fig. 1 .
  • the feed pipes 12 of the second combustion stage are terminated by the secondary nozzles 13 which are fixed in their position by means of the respective lock nuts (not shown).
  • the gas distributor 10 is attached to the inner burner feed pipe 4 of the first combustion stage.
  • the entire gas burner 1 is welded to the cover 6 which is shown in a partial view in Fig. 1 .
  • the cover 6 is, in turn, attached to an air box by means of the respective threaded coupling member (not shown).
  • the cover is provided with the gasket 18, with the insulating member 19, with the holder 16 for the insulating member and with the refractory caulking compound 20.
  • Fig. 2 is a detailed view showing the burner head 22 on a primary burner.
  • the burner head is formed by a welded-on piece attached to the burner feed pipes 4 and 7 and provided with the power nozzles 3 arranged in the area of the bevelled front face 25, with the stabilizing nozzles 5 arranged underneath the power nozzles and formed in the cylindrical wall and with the flame catcher 21 arranged underneath the stabilizing nozzles 5 and extending from the outer wall of the head 22, the flame catcher having a triangular cross-section with the upper leg 24 perpendicularly adjoining the outer wall of the head 22 and with the hypotenuse 23 extending in a slanting inward and downward direction.
  • the burner head 22 itself and the flame catcher 21 have 80 mm and 100 mm in diameter, respectively. These diametric dimensions are important with respect to the necessity of ensuring a sufficient stability of the flame in the area of the stabilizing nozzles 5. In the latter area, a considerable decrease of the turbulent flow and an increase of the backflow of the combustion air occur.
  • the stabilizing nozzles 5 are suitably arranged between the flame catcher 21 and the front face of the burner head 22 and are formed by bores having their axes inclined at the angle ß.
  • the stabilizing nozzles enable the fuel to be appropriately mixed with the combustion air supplied to serve as oxidizing agent during the combustion process. After having been prepared under the above conditions, the combustible mixture achieves a flow velocity that is lower than the burning velocity.
  • the flame remains "on the leeward side". In this manner, the flame can get stabilized in the above area. Owing to that, the flame provides a sufficient initiation energy, which is required for igniting the air-fuel mixture, the latter being formed by mixing the gas flowing out of the power nozzles with the combustion air flowing around the burner head. If the flame were not anchored in the area of the flame catcher 21 in the above described manner, it would get torn away from the burner head 22.
  • the above described gas burner eliminates the above mentioned unreliable operational properties.
  • the maximum stability of combustion is achieved particularly by means of the constructional arrangement of the head 22 of the primary burner.
  • the desired stability of combustion is achieved by the incorporation of the flame catcher 21 into the gas burner head 22, since the flame catcher creates a turbulent whirling flow in the area of the stabilizing nozzles 5.
  • Such flow is characterized by having a lower velocity downstream the flame catcher 21, thus mitigating turbulences and stabilizing the flame in said area.
  • the above described arrangement enables the gas flowing out of the power nozzles to be reliably ignited. It provides a sufficient initiation energy, which is required for igniting the mixture and stabilizing the combustion process in the area o the power nozzles of the head 22.
  • the gas burner head 22 has an annular shape which enables an auxiliary oil burner or suitable measuring and regulating members to be centrally positioned within the head.
  • the gaseous fuel is supplied to the gas burner head through the annular gap between the burner feed tuber 7 and 4.
  • the flow rate and the pressure of the gaseous fuel are controlled by means of a restricting orifice which determines the ratio between the primary and secondary portions of the gas burner.
  • the pressure of the gaseous fuel is lower in the primary portion than in the secondary one which significantly improves the stability of the primary portion and enables higher working pressures and flow rates to be utilized in the secondary portion. This considerably increases the efficiency of mixing the combustion air with the secondary fuel.
  • the burner head may be provided with 3 or four secondary nozzles. The angular orientation of the secondary nozzles relative to the axis of the burner head enables the tangential discharge of the gas to be achieved in the radial direction.

Landscapes

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

Claims (1)

  1. Tete de bruleur, positionée sur une pièce primaire de bruleur a gaz,qui est construite et soudée en forme cylindrique et creuse. L'arrondissement inférieur a l'intérieur d'une pièce soudée est soudé sur une tube de bruleur externe (7),et en meme temps est l'arrondissement supérieur a l'intérieur soudé sur une tube de bruleur interne (4). Tete (22) possède en endroit de crispation frontale (25) des tyuéres de puissance (3) et accroche- flamme (21),qui a en coupe verticale une forme d'un triangle. Son bras (cathéte) supérieur (24) touche perpendiculairement coté externe du tete (22) et bras (cathéte) inférieur (23) est orienté obliquement vers bas.Tete de bruleur est caractérisé en ce qu'au dessous de tuyéres puissantes (3) sont rangées des tuyéres de stabilisation (5) en coté cylindrique en angle de (beta). Au dessous de tuyéres de stabilisation (5) est rangé un accroche-flamme (21).
EP13466023.2A 2013-09-30 2013-09-30 Tête de brûleur Not-in-force EP2853813B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13466023.2A EP2853813B1 (fr) 2013-09-30 2013-09-30 Tête de brûleur
PL13466023T PL2853813T3 (pl) 2013-09-30 2013-09-30 Głowica palnika

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13466023.2A EP2853813B1 (fr) 2013-09-30 2013-09-30 Tête de brûleur

Publications (2)

Publication Number Publication Date
EP2853813A1 EP2853813A1 (fr) 2015-04-01
EP2853813B1 true EP2853813B1 (fr) 2016-10-26

Family

ID=49486426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13466023.2A Not-in-force EP2853813B1 (fr) 2013-09-30 2013-09-30 Tête de brûleur

Country Status (2)

Country Link
EP (1) EP2853813B1 (fr)
PL (1) PL2853813T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10811154B2 (en) * 2010-08-12 2020-10-20 Holtec International Container for radioactive waste
US11373774B2 (en) 2010-08-12 2022-06-28 Holtec International Ventilated transfer cask
US11887744B2 (en) 2011-08-12 2024-01-30 Holtec International Container for radioactive waste
CN104272398A (zh) 2012-04-18 2015-01-07 霍尔泰克国际股份有限公司 高放射性废料的存储和/或运输

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3183053B2 (ja) * 1994-07-20 2001-07-03 株式会社日立製作所 ガスタービン燃焼器及びガスタービン
JPH08178224A (ja) * 1994-12-28 1996-07-12 Ishikawajima Harima Heavy Ind Co Ltd ガスバーナ装置
JP4600850B2 (ja) * 2006-10-30 2010-12-22 バブ日立工業株式会社 ガスバーナ

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2853813A1 (fr) 2015-04-01
PL2853813T3 (pl) 2017-09-29

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