EP2275742A1 - Buse et procédé de fabrication d'une buse - Google Patents

Buse et procédé de fabrication d'une buse Download PDF

Info

Publication number
EP2275742A1
EP2275742A1 EP09165409A EP09165409A EP2275742A1 EP 2275742 A1 EP2275742 A1 EP 2275742A1 EP 09165409 A EP09165409 A EP 09165409A EP 09165409 A EP09165409 A EP 09165409A EP 2275742 A1 EP2275742 A1 EP 2275742A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
protection layer
wear protection
fuel
ceramic
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.)
Withdrawn
Application number
EP09165409A
Other languages
German (de)
English (en)
Inventor
Alessandro Casu
Patricia Hülsmeier
Andre Kluge
Claus Krusch
Thomas Kunadt
Harm Speicher
Thomas-Dieter Tenrahm
Marc Tertilt
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP09165409A priority Critical patent/EP2275742A1/fr
Publication of EP2275742A1 publication Critical patent/EP2275742A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/38—Nozzles; Cleaning devices therefor
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/76—Protecting flame and burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/10—Burner material specifications ceramic

Definitions

  • the invention relates to a nozzle which is suitable for guiding fuel, in particular fuel oil, with an inside and outside. Furthermore, the invention relates to a method for producing a nozzle.
  • Gas turbines are known to have the following components: a compressor for compressing air; a combustion chamber for generating hot gas by burning fuel in the presence of the compressed air supplied from the compressor; and a turbine in which the hot gas supplied from the combustion chamber is expanded.
  • Gas turbines are known to emit undesirable nitrogen oxides (NOx) and carbon monoxide (CO).
  • NOx nitrogen oxides
  • CO carbon monoxide
  • One known factor affecting NOx emissions is the combustion temperature. If the combustion temperature is lowered, the amount of NOx released decreases. However, high combustion temperatures are desirable to achieve high efficiency. It is known that leaner fuel / air mixtures burn cooler and therefore less NOx emissions arise.
  • One known technique for producing a leaner fuel mixture is to create turbulence to mix air and fuel as evenly as possible before combustion to avoid creating zones of rich mixture in which there are high temperature localities called hot spots).
  • an injection of the fuel oil via swirl generator in which the oil is mixed with air.
  • the oil within the nozzles used for the injection can be set in a swirling motion.
  • the object of the invention is the disclosure of a nozzle which is based on a defined with respect to the life of the nozzle defined injection. Another object is to provide a method for producing such a nozzle.
  • the first object is achieved according to the invention by specifying a nozzle which is suitable for guiding fuel, in particular fuel oil, with an inside and outside, wherein the inside of the nozzle at least partially comprises a ceramic wear protection layer.
  • a ceramic wear protection layer on the inside of the nozzle leaching will be avoided by, for example, impurities in the fuel oil.
  • the application of a protective layer only on the inside can also be easy to manufacture and also be realized later.
  • the low wear extends the life of the nozzle and increases the availability of the system, thus saving costs.
  • the oil can be injected in a better controlled way in relation to the service life of the component. This ensures better flame stability.
  • the ceramic wear protection layer comprises an oxide ceramic. This is particularly advantageous because it has a high hardness and heat resistance, and a high chemical and thermal resistance. Oxide ceramics are highly resistant to corrosion even at high temperatures in the range of use up to> 1000 ° C, which is why they are suitable for use with nozzles, in particular nozzles in a burner which feed fuel to a combustion chamber.
  • the ceramic wear protection layer preferably comprises at least boron nitride (BN).
  • boron nitride does not release carbon under the influence of temperature. Furthermore, with boron nitride, the hardness does not decrease so rapidly with increasing temperature. Therefore, boron nitride is therefore suitable as a wear protection layer for components which are exposed to high temperatures.
  • the ceramic wear protection layer comprises at least aluminum oxide (Al 2 O 3 ).
  • Al 2 O 3 aluminum oxide
  • the ceramic wear protection layer preferably comprises at least zirconium dioxide (ZrO 2 ).
  • Zirconia ZrO 2 is a high-performance ceramic and has high resistance to chemical, thermal and mechanical influences. Therefore, it is particularly suitable as a wear protection layer.
  • Spinel is advantageous because it has a high hardness.
  • tangential openings in particular tangential bores are attached.
  • the tangential bores can be retrofitted into the component e.g. be introduced by laser.
  • a burner is designed with such a nozzle.
  • a nozzle is resistant to high temperatures, which occur in a burner.
  • such a nozzle is strongly protected against wear, as they also occur in a burner by high temperatures / or and contamination of the fuel.
  • the object related to the method is achieved by stating a method for manufacturing a fuel nozzle with an inside or outside, wherein the inside is coated with an oxide-ceramic material by means of chemical vapor deposition.
  • the chemical vapor deposition is characterized by the conformal layer deposition. It also allows the coating of complex three-dimensionally shaped surfaces. So z. B. hollow body to be uniformly coated on its inside. Thus, it is particularly well to coat already manufactured and / or in-use nozzles.
  • tangential openings are preferably introduced into the nozzle by means of a laser.
  • the laser processing can be introduced targeted openings having a defined diameter.
  • the wear protection layer is not damaged by, for example, ridges / edges, which are caused by, for example, bores by means of a drill, and which must be filed off, or flaking.
  • the introduction of tangential openings by means of laser production technology is also easy to implement.
  • FIG. 1 shows a nozzle 1 according to the prior art.
  • This includes a fuel channel 6 and a return pipe 3.
  • the nozzle is arranged in an oil burner housing 5.
  • the nozzle 1 can comprise tangential bores 4.
  • impurities in the fuel oil cause leaching in the area of the swirl chamber.
  • washouts gradually change the nozzle characteristic of the fuel oil burners, which adversely affects normal fuel oil diffusion operation and can cause combustion problems.
  • cracks may occur in the nozzle 1.
  • a ceramic wear protection layer 60 is now mounted on the inside 30 of the nozzle 10 ( FIG. 2 ).
  • washouts are avoided just in the area of Tangetialbohrungen.
  • the service life of the component is extended by a small closure.
  • the availability of the system is increased and costs are saved.
  • this improved flame stability has a favorable effect on resulting NOx values.
  • the wear-resistant layer is made by chemical vapor deposition (CVD). At the heated surface of a substrate, a solid component is deposited due to a chemical reaction from the gas phase.
  • CVD chemical vapor deposition
  • volatile compounds of the layer components must exist, which deposit the solid layer at a certain reaction temperature.
  • the process of chemical vapor deposition is characterized by at least one reaction on the surface of the workpiece to be coated. At least one gaseous starting compound and at least two reaction products - at least one of which in the solid phase - must be involved in this reaction.
  • a special feature of the process is the conformal layer deposition. Compared to physical processes, chemical vapor deposition also enables the coating of complex three-dimensionally shaped surfaces.
  • boron nitride which is characterized by particular hardness, is suitable as the oxide-ceramic material.
  • aluminum oxide Al 2 O 3
  • zirconium dioxide ZrO 2
  • spinel MgAl 2 O 4
  • the nozzle 10 can be coated prior to installation, wherein the tangential bores 4 can be introduced, for example after the coating in the coated component. These can then be attached by laser, for example. However, a subsequent coating of the nozzle is possible.
  • the leaching in the nozzle in the region of the tangential bores is thus avoided by the nozzle according to the invention. It ensures a more uniform flow of the oil and thus better flame stability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP09165409A 2009-07-14 2009-07-14 Buse et procédé de fabrication d'une buse Withdrawn EP2275742A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09165409A EP2275742A1 (fr) 2009-07-14 2009-07-14 Buse et procédé de fabrication d'une buse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09165409A EP2275742A1 (fr) 2009-07-14 2009-07-14 Buse et procédé de fabrication d'une buse

Publications (1)

Publication Number Publication Date
EP2275742A1 true EP2275742A1 (fr) 2011-01-19

Family

ID=41328664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09165409A Withdrawn EP2275742A1 (fr) 2009-07-14 2009-07-14 Buse et procédé de fabrication d'une buse

Country Status (1)

Country Link
EP (1) EP2275742A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102537954A (zh) * 2011-12-23 2012-07-04 山东大学 一种叠层陶瓷水煤浆喷嘴的制备工艺
CN103335309A (zh) * 2013-06-21 2013-10-02 孝义市和中兴矿产有限公司 高温窑炉废油燃烧器喷火嘴
CN107522478A (zh) * 2017-08-24 2017-12-29 广州普华灵动机器人技术有限公司 陶瓷燃烧器制作工艺方法与陶瓷燃烧器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512323A1 (de) * 1994-08-19 1996-10-02 Schlattl Werner Bavaria Tech Funktionselement für Schweißvorrichtungen
EP0845634A2 (fr) * 1996-11-29 1998-06-03 Kabushiki Kaisha Toshiba Chambre de combustion pour turbine à gaz et son procédé de fonctionnement
EP1502694A2 (fr) * 2004-07-21 2005-02-02 Jürgen Bach Immobilien und Maschinen KG Buse de découpage ou de soudage
WO2007133904A2 (fr) * 2006-05-11 2007-11-22 Hypertherm, Inc. Dispositifs diélectriques pour torche à arc de plasma
DE102007040890A1 (de) * 2007-08-29 2009-03-05 Siemens Ag Kohlenstaubkombinationsbrenner mit integriertem Pilotbrenner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512323A1 (de) * 1994-08-19 1996-10-02 Schlattl Werner Bavaria Tech Funktionselement für Schweißvorrichtungen
EP0845634A2 (fr) * 1996-11-29 1998-06-03 Kabushiki Kaisha Toshiba Chambre de combustion pour turbine à gaz et son procédé de fonctionnement
EP1502694A2 (fr) * 2004-07-21 2005-02-02 Jürgen Bach Immobilien und Maschinen KG Buse de découpage ou de soudage
WO2007133904A2 (fr) * 2006-05-11 2007-11-22 Hypertherm, Inc. Dispositifs diélectriques pour torche à arc de plasma
DE102007040890A1 (de) * 2007-08-29 2009-03-05 Siemens Ag Kohlenstaubkombinationsbrenner mit integriertem Pilotbrenner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102537954A (zh) * 2011-12-23 2012-07-04 山东大学 一种叠层陶瓷水煤浆喷嘴的制备工艺
CN102537954B (zh) * 2011-12-23 2013-12-18 山东大学 一种叠层陶瓷水煤浆喷嘴的制备工艺
CN103335309A (zh) * 2013-06-21 2013-10-02 孝义市和中兴矿产有限公司 高温窑炉废油燃烧器喷火嘴
CN103335309B (zh) * 2013-06-21 2015-12-30 孝义市和中兴矿产有限公司 高温窑炉废油燃烧器喷火嘴
CN107522478A (zh) * 2017-08-24 2017-12-29 广州普华灵动机器人技术有限公司 陶瓷燃烧器制作工艺方法与陶瓷燃烧器

Similar Documents

Publication Publication Date Title
DE102008029512B4 (de) Verfahren und Vorrichtung zum Befeuern eines Drehrohrofens
DE69622137T2 (de) Brenner mit niedrigem NOx-Ausstoss
DE19748461A1 (de) Überzugs-Zusammensetzung für Substrate auf Metallgrundlage und dazugehörige Verfahren
WO2010066516A2 (fr) Lance à combustible pour brûleur
EP2275742A1 (fr) Buse et procédé de fabrication d'une buse
EP0289851A2 (fr) Procédé et brûleur pour la combustion de combustible
EP3458431B1 (fr) Procédé de fabrication d'un écran thermique céramique à revêtement de réaction
DE4208951C2 (de) Heißgaserzeuger
EP1899649B1 (fr) Elément en céramique avec surface résistante au gaz chauds et procédé de fabrication
DE3446788C2 (fr)
EP2881377B1 (fr) Procédé destinés à la fabrication de clinker
DE102010053068A1 (de) Verfahren und Vorrichtung zur verdünnten Verbrennung
DE102019122940A1 (de) Regenerativbrenner für stark reduzierte NOx Emissionen
DE102005005832B4 (de) Rekuperatorbrenner und Verfahren zum Erhitzen eines Industrieofens unter Einsatz des Brenners
DE3932751C2 (de) Abgasfackel
EP1736706B1 (fr) Dispositif pour introduire des matériaux dans une chambre de réaction
DE10160325A1 (de) Mit flüssigem Brennstoff betriebener Flachflammenbrenner
DE102004047443B3 (de) Flachflammenbrenner
EP2275741A1 (fr) Buse et procédé de fabrication d'une buse
DE4130922C2 (de) Brenner für Hochtemperaturprozesse sowie Verfahren zum Betreiben des Brenners
DE102009039894B4 (de) Verwendung eines Brennstoffs umfassend ein Dialkylperoxid in einem industriellen Hochtemperaturverbrennungsprozess
EP1072573A1 (fr) Procédé de fabrication d'une pièce réfractaire et brique céramique de chambre de combustion
DE132069C (fr)
DE10224769A1 (de) Gasbrenner mit extremem Stellbereich zur Eigenkarborierung und Stickoxidminderung
DE102004034211A1 (de) Verfahren und Vorrichtung zur NOx-armen Verbrennung

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): 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 SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110720