EP0066570A1 - Bruleur a haute temperature. - Google Patents

Bruleur a haute temperature.

Info

Publication number
EP0066570A1
EP0066570A1 EP81900226A EP81900226A EP0066570A1 EP 0066570 A1 EP0066570 A1 EP 0066570A1 EP 81900226 A EP81900226 A EP 81900226A EP 81900226 A EP81900226 A EP 81900226A EP 0066570 A1 EP0066570 A1 EP 0066570A1
Authority
EP
European Patent Office
Prior art keywords
air
flame tube
jacket
fuel
inlet
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
EP81900226A
Other languages
German (de)
English (en)
Other versions
EP0066570B1 (fr
Inventor
Lennart T Eriksson
Olle Nystrom
Ebert Andersson
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.)
GKN Aerospace Sweden AB
Original Assignee
Volvo Flygmotor AB
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 Volvo Flygmotor AB filed Critical Volvo Flygmotor AB
Publication of EP0066570A1 publication Critical patent/EP0066570A1/fr
Application granted granted Critical
Publication of EP0066570B1 publication Critical patent/EP0066570B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F23C7/02—Disposition of air supply not passing through burner
    • 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 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber

Definitions

  • Such a burner should also be able to be used both 20 as a high-pressure burner and as a high-velocity burner ⁇ and produce a gas with high temperature and velocity to . produce a high heat transfer against a forged part, for example.
  • HTB High-Temperature Burner
  • the burner according to the invention is of the can combustion chamber type, i.e. the fuel is combusted in
  • OMPI a volume which is limited by a can, or a pre-combustion chamber with very high load per unit of volume.
  • 3 value is 50 MW/m as compared with previous constructions, even smaller ones which usually have values of about 3 10-15 M /m and which often have poorer efficiencies and greater percentages of residual oxygen.
  • This type of burner is distinct from the so-called free-flame burners.
  • the HTB can be easily converted into a gas burner by replacing the interior hot parts.
  • the external parts with connections etc. are completely identical for the gas and oil burners.
  • the flame tube is easily removable by virtue of the fact that it is only attached to the end piece and inserted into the burner jacket.
  • the flame surveillance, ignitor and spreader are collected at the end also.
  • the burner is made completely of steel, which makes starting up and shutting down quicker than with masonry constructions. Another advantage is that a steel construc ⁇ tion does not result in brick and mortar particles in the gas when hot air or hot gas is produced.
  • OMPI By controlling the operation, we keep the mean temperature for the flame tube at close to the highest temperature at any point, and the material temperature is maintained by controlling the load or the inlet tempera- ture.
  • the flow velocities at the rear side of the flame tube are therefore kept highest where the load is highest, the area closest to the airhole.
  • the reconnection also produces a double cooling here.
  • the velocities are selected so that the material temperatures rise only moderately with elevated inlet temperature. Thus for example a rise in the inlet temperature from 20 to 600 C produces a rise in the maximum material temperature of about 250 C to 950 C at slightly over stoichiometric combustion.
  • Compressed air supported nozzles are used, both of a standard type and of a specially developed type which permits greater operational range. This is a so-called Y (ypsilon type or multijet type). By having as many separate holes as the number of airholes in the flame tube, it permits a very good control of the dispersing and combustion characteristics by rotating the nozzle.
  • oils with high sulphur content are advantageous in cement production.
  • metals are treated with heat, e.g. rolling, pressing, forging, melting, etc.
  • Fuel is also used for firing brick and ceramics, for burning lime etc., as well as a great number of different heating purposes in buildings etc.
  • Fig. 1 shows a high-temperature burner for gas in section.
  • Fig. 2 shows the same burner but adapted for oil, also in section.,
  • Fig. 3 shows a section along the line III-III in Fig. 2.
  • Fig. 4 shows a schematic cross section through an oil burner according to the invention with arrows showing the various airflows
  • Fig. 5 shows the flow at the air intake in a common, commercial burner.
  • the jacket is provided with a pipe 5 for intake of combustion air and the forward portion of the jacket can be provided with an extra jacket 50 which forms a space 6 between the jackets.
  • the forward flange 3 is provided with bolt holes 7 for adapting the burner and a bowl-shaped outlet cone 8 is attached to the flange, with a central opening 9 for the flame and/or flue gases 0
  • the end piece 10 is fastened to the rear flange 2 with bolts 11.
  • the flame tube insert 13 is fastened in a hole 12 in the centre of the end piece and it extends up to the front flange 3 at the same time as it expands in a funnel to the same diameter as the jacket 1.
  • the burner 23 with the coupling 24 to the fuel line 25.
  • the burner is fastened in the end piece 10 with bolts 26.
  • the entire flame tube unit can be removed and replaced quite simply by detaching the end piece from the jacket and inserting a new unit, for example when changing fuels or for maintenance.
  • Fig. 2 shows an HTB for oil. It differs from the gas model only in that the flame tube 33 has a cylindrical form and is shorter than the corresponding gas version 13, and that the airholes 34 are arranged in another manner with a covering ring or guiding tube 35 for controlling the supply of air 0
  • the gas burner 13 has also been replaced with an oil burner 36 of course.
  • the flow in a "normal" can combustion chamber is shown in Fig. 5.
  • the resulting velocity R R is directed downwards and forwardSo
  • a maximum of 30% of the air can be forced to enter the primary zone, and even with the aid of guide vanes and similar arrangements, the flow can be increased to at most 50%, while in the construction according to the invention about 75% of the air enters the primary zone. This creates the possibility of operating the burner at somewhere near stoichiometric ratios without fierce flames being formed outside the burner with a combustion chamber of normal length.
  • the same technique can also be used on the wall clos- est to the upstream holes, i.e. the various slots 45.
  • This portion of the flame tube can also be cooled more effect ⁇ ively by increasing the flow velocity on the other side of the flame tube with an extra guide tube 46.
  • the flame tube wall in the area of the holes is subjected to the highest temperatures either just before or just after the holes depending on which type of nozzle is used.
  • the highest temperature is obtained downstream of the holes, but with usual standard nozzles, the temperature maximum is moved and will lie upstream of the holes.
  • the multijet nozzle also permits a greater range of control ' due to the flame-holding effect obtained around each stream. Also contributing to the higher efficiency of the .HTB is the fact that the nozzle can have as many holes, as the holes in the flame tube, and by adjusting the relative position of the nozzle and the flame tube, optimum operating conditions are achieved when a stream from the.nozzle is directed somewhat displaced in the rotational direction of the induced swirl in relation to the airhole.
  • inlet temperatures Concerning inlet temperatures and choice of materials, it may be added that for inlet temperatures of up to 300 C, Avesta 253 MA was used and for up to 500-600 C, Inconel or Nimonic were used. Work is in progress on a development of flame tubes of ceramic material for still higher inlet temperatures. There is no difference in the appearance of ceramic tubes and metal tubes with the exception that the ceramic tube must be made thicker, about 4-6 mm.
  • a larger jacket is selected for ceramic flame tubes than for metal flame tubes.
  • a heat reduction can be obtained by placing an extra jacket 50 around the jacket. In the gap, air or water can then be circulated This results in a cooler jacket and correspond ⁇ ingly increased cooling by increased heat radiation from the hot, inner portions towards the cooler outer portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)

Abstract

Le bruleur a haute temperature peut etre utilise a la fois pour le gaz et le petrole en changeant simplement le tube a flamme. Le bruleur consiste en un tube a flamme (13) de preference en metal, avec des orifices d'admission d'air (14), un ajutage (23), des conduites d'admission (21, 22, 25) pour l'air et le combustible, une chemise (1) et un cone de sortie (8). Le tube a flamme est fixe dans la piece extreme (10) du bruleur et peut etre change facilement. Une bague conductrice d'inversion du flux de l'air d'admission passant au travers des trous d'admission vers l'interieur et en arriere vers la zone de combustion primaire est montee autour du tube a flamme, et a chaque orifice d'admission d'air se trouve au moins une fente amont et/ou aval pour refroidir le tube a flamme. Des bagues conductrices supplementaires peuvent etre prevues pour intensifier le refroidissement, et une chemise supplementaire (50) peut etre disposee autour de la chemise (1) pour la circulation d'eau ou d'air dans l'espace (6) entre les deux chemises. Le cone de sortie (8) peut egalement etre refroidi par refroidissement du film.
EP81900226A 1980-12-12 1980-12-12 Bruleur a haute temperature Expired EP0066570B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1980/000333 WO1982002084A1 (fr) 1980-12-12 1980-12-12 Bruleur a haute temperature

Publications (2)

Publication Number Publication Date
EP0066570A1 true EP0066570A1 (fr) 1982-12-15
EP0066570B1 EP0066570B1 (fr) 1984-04-25

Family

ID=20339987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81900226A Expired EP0066570B1 (fr) 1980-12-12 1980-12-12 Bruleur a haute temperature

Country Status (5)

Country Link
EP (1) EP0066570B1 (fr)
JP (1) JPS57501925A (fr)
DE (1) DE3067658D1 (fr)
NO (1) NO152883C (fr)
WO (1) WO1982002084A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228091A3 (fr) * 1986-01-03 1988-08-24 A/S Kongsberg Väpenfabrikk Brûleur compact dans le sens axial pour une turbine à gaz et procédé pour le refroidir
DE3834762A1 (de) * 1988-10-12 1990-04-19 Ruhrgas Ag Hochgeschwindigkeitsbrenner
US7654820B2 (en) * 2006-12-22 2010-02-02 David Deng Control valves for heaters and fireplace devices
CN102261650B (zh) * 2011-05-30 2013-05-22 北京北机机电工业有限责任公司 燃烧室
US9752779B2 (en) 2013-03-02 2017-09-05 David Deng Heating assembly
CN108050509B (zh) * 2017-11-30 2019-11-08 谢丽萍 一种基于液体乙醇-天然气组合燃料的燃烧炉及其方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4920138B1 (fr) * 1970-05-12 1974-05-22
FR2118276A5 (fr) * 1970-12-16 1972-07-28 Heurtey Sa
GB1423052A (en) * 1973-03-27 1976-01-28 British Leyland Uk Ltd Combustion chamber assembly for a gas turbine engine
GB1511849A (en) * 1974-11-28 1978-05-24 Secr Defence Combustion apparatus
US3978662A (en) * 1975-04-28 1976-09-07 General Electric Company Cooling ring construction for combustion chambers
US4118171A (en) * 1976-12-22 1978-10-03 Engelhard Minerals & Chemicals Corporation Method for effecting sustained combustion of carbonaceous fuel
US4128388A (en) * 1977-05-12 1978-12-05 Challenge-Cook Bros., Inc. Geyseric burner assembly and method for combusting fuels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8202084A1 *

Also Published As

Publication number Publication date
JPS57501925A (fr) 1982-10-28
NO152883C (no) 1985-12-04
WO1982002084A1 (fr) 1982-06-24
DE3067658D1 (en) 1984-05-30
EP0066570B1 (fr) 1984-04-25
NO152883B (no) 1985-08-26
NO822736L (no) 1982-08-11

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