EP2853813A1 - Burner head - Google Patents

Burner head Download PDF

Info

Publication number
EP2853813A1
EP2853813A1 EP13466023.2A EP13466023A EP2853813A1 EP 2853813 A1 EP2853813 A1 EP 2853813A1 EP 13466023 A EP13466023 A EP 13466023A EP 2853813 A1 EP2853813 A1 EP 2853813A1
Authority
EP
European Patent Office
Prior art keywords
burner
head
welded
nozzles
feed pipe
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
EP13466023.2A
Other languages
German (de)
French (fr)
Other versions
EP2853813B1 (en
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 PL13466023T priority Critical patent/PL2853813T3/en
Priority to EP13466023.2A priority patent/EP2853813B1/en
Publication of EP2853813A1 publication Critical patent/EP2853813A1/en
Application granted granted Critical
Publication of EP2853813B1 publication Critical patent/EP2853813B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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.
  • 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.
  • the burner head 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 and the top internal circumference of the being welded to the inner burner feed pipe, the head being provided with power nozzles arranged in the area of the bevelled front face, with angled stabilizing nozzles arranged underneath the power nozzles and formed in the cylindrical wall and with an annular flame catcher arranged underneath the stabilizing nozzles and extending from the outer wall of the head, the flame catcher having a triangular cross-section with the upper leg perpendicularly adjoining the outer wall of the head and with the hypotenuse extending in a slanting inward and downward direction.
  • 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 ⁇ .
  • 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)

Abstract

Burner head (22) of the primary portion of a gas burner 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), the head (22) being 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 at the angle (ß) relative to the same and with the annular 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.

Description

    Field of the invention
  • 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.
    • Background of the invention
  • 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.
  • 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.
    • Summary of the invention
  • The above drawbacks are largely eliminated by the burner head according to the invention, wherein the burner head 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 and the top internal circumference of the being welded to the inner burner feed pipe, the head being provided with power nozzles arranged in the area of the bevelled front face, with angled stabilizing nozzles arranged underneath the power nozzles and formed in the cylindrical wall and with an annular flame catcher arranged underneath the stabilizing nozzles and extending from the outer wall of the head, the flame catcher having a triangular cross-section with the upper leg perpendicularly adjoining the outer wall of the head and with the hypotenuse extending in a slanting inward and downward direction.
    • Brief description of the drawings
  • The invention will be further explained with reference to the accompanying drawing, wherein 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, and Fig. 2 shows the burner head in a detailed view.
    • Preferred embodiment of the invention
  • 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. It is evident that 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. Within the combustion area, 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. Thus, 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 β. Thus, 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. Thus, 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. Hence, 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. According to the particular application, 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.

Claims (1)

  1. Burner head formed on the primary portion of a gas burner, characterized in that the burner head 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), the head (22) being 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 at the angle (β) relative to the same and with the annular 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.
EP13466023.2A 2013-09-30 2013-09-30 Burner head Not-in-force EP2853813B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL13466023T PL2853813T3 (en) 2013-09-30 2013-09-30 Burner head
EP13466023.2A EP2853813B1 (en) 2013-09-30 2013-09-30 Burner head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13466023.2A EP2853813B1 (en) 2013-09-30 2013-09-30 Burner head

Publications (2)

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

Family

ID=49486426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13466023.2A Not-in-force EP2853813B1 (en) 2013-09-30 2013-09-30 Burner head

Country Status (2)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180322970A1 (en) * 2010-08-12 2018-11-08 Holtec International Container for radioactive waste
US10892063B2 (en) 2012-04-18 2021-01-12 Holtec International System and method of storing and/or transferring high level 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08178224A (en) * 1994-12-28 1996-07-12 Ishikawajima Harima Heavy Ind Co Ltd Gas burner
US5660045A (en) * 1994-07-20 1997-08-26 Hitachi, Ltd. Gas turbine combustor and gas turbine
JP2008111591A (en) * 2006-10-30 2008-05-15 Bab-Hitachi Industrial Co Gas burner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660045A (en) * 1994-07-20 1997-08-26 Hitachi, Ltd. Gas turbine combustor and gas turbine
JPH08178224A (en) * 1994-12-28 1996-07-12 Ishikawajima Harima Heavy Ind Co Ltd Gas burner
JP2008111591A (en) * 2006-10-30 2008-05-15 Bab-Hitachi Industrial Co Gas burner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180322970A1 (en) * 2010-08-12 2018-11-08 Holtec International Container for radioactive waste
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
US10892063B2 (en) 2012-04-18 2021-01-12 Holtec International System and method of storing and/or transferring high level radioactive waste
US11694817B2 (en) 2012-04-18 2023-07-04 Holtec International System and method of storing and/or transferring high level radioactive waste

Also Published As

Publication number Publication date
EP2853813B1 (en) 2016-10-26
PL2853813T3 (en) 2017-09-29

Similar Documents

Publication Publication Date Title
US9822967B2 (en) Apparatus for burning pulverized solid fuels with oxygen
EP2853813B1 (en) Burner head
US9182124B2 (en) Gas turbine and fuel injector for the same
US9841189B2 (en) Lean premix burner having center gas nozzle
CA2848718C (en) Solid fuel burner
US7661269B2 (en) Gas turbine burner
AU2013223872B2 (en) Burner
EP3469264B1 (en) System for increasing the concentration of pulverized fuel in a pre-ignition conduit
CN106678838A (en) Liquid accumulation preventing injection type incandescent light structure
CN205690401U (en) The strong mixing multi fuel mixing burner of direct current
CN108885003B (en) Gas turbine combustor
KR102405991B1 (en) Flamesheet combustor contoured liner
EP3645941B1 (en) Burner with a combustion head with low emission of nox
CN115289473A (en) Gas-powder dual-fuel burner
RU61010U1 (en) BURNER FOR LIQUID AND GAS FUEL COMBUSTION AND FUEL AND AIR SUPPLY SYSTEM
NO850526L (en) BURNER FOR POWDER-FUEL COMBUSTION
RU2817903C1 (en) Multi-burner closed flare installation, method of gas combustion on this installation and device of burner of multi-burner closed flare installation
RU2232941C1 (en) Burner for oil heating unit
CZ305233B6 (en) Burner head
CZ201783A3 (en) A burner head for low calorific value fuels
CZ26534U1 (en) Burner head
RU2193730C1 (en) Gas burner
RU2480673C1 (en) Device for fuel burning
RU135396U1 (en) GAS-BURNER
JPS6237606A (en) Solid fuel burning device with low nox concentration

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20130930

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

R17P Request for examination filed (corrected)

Effective date: 20150723

RIC1 Information provided on ipc code assigned before grant

Ipc: F23D 14/06 20060101ALI20151211BHEP

Ipc: F23D 14/22 20060101AFI20151211BHEP

Ipc: F23D 23/00 20060101ALI20151211BHEP

Ipc: F23D 14/58 20060101ALI20151211BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160726

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 840293

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161115

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602013013176

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20161026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170126

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170127

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170226

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170227

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602013013176

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170126

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20170727

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20170930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20130930

REG Reference to a national code

Ref country code: AT

Ref legal event code: UEP

Ref document number: 840293

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SK

Payment date: 20190930

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20190926

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20190924

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190923

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161026

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602013013176

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 840293

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200930

REG Reference to a national code

Ref country code: SK

Ref legal event code: MM4A

Ref document number: E 23328

Country of ref document: SK

Effective date: 20200930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210401

Ref country code: SK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200930