EP0180098A2 - Chambre de combustion - Google Patents

Chambre de combustion Download PDF

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Publication number
EP0180098A2
EP0180098A2 EP85113163A EP85113163A EP0180098A2 EP 0180098 A2 EP0180098 A2 EP 0180098A2 EP 85113163 A EP85113163 A EP 85113163A EP 85113163 A EP85113163 A EP 85113163A EP 0180098 A2 EP0180098 A2 EP 0180098A2
Authority
EP
European Patent Office
Prior art keywords
housing
insert
axis
combustion chamber
face
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
EP85113163A
Other languages
German (de)
English (en)
Other versions
EP0180098B1 (fr
EP0180098A3 (en
Inventor
Kirill Nikolaevich Zvyagintsev
Leonid Markovich Novikov
Evgeny Alexandrovich Sinitsyn
Alexei Alexandrovich Odintsovsky Raion Falin
Elena Sergeevna Schepnova
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.)
EOn Ruhrgas AG
VNIIPROMGAZ Vsesojuzny Nauchno-Issledovatelsky Institut ispolzovaniya gaza v narodnom khozyaistve
Original Assignee
Ruhrgas AG
VNIIPROMGAZ Vsesojuzny Nauchno-Issledovatelsky Institut ispolzovaniya gaza v narodnom khozyaistve
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 Ruhrgas AG, VNIIPROMGAZ Vsesojuzny Nauchno-Issledovatelsky Institut ispolzovaniya gaza v narodnom khozyaistve filed Critical Ruhrgas AG
Publication of EP0180098A2 publication Critical patent/EP0180098A2/fr
Publication of EP0180098A3 publication Critical patent/EP0180098A3/de
Application granted granted Critical
Publication of EP0180098B1 publication Critical patent/EP0180098B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber

Definitions

  • the invention relates to a combustion chamber, in particular for use in connection with high-speed burners.
  • combustion chambers are mainly used in heat treatment, heating and annealing furnaces in the mechanical engineering industry and in the iron and metal industry.
  • the ceramic combustion chambers used primarily in high-speed burners have only a limited service life due to the high operating temperatures and the strong heat exchange, particularly in the case of pulse-controlled burners, and must therefore be replaced accordingly frequently. Replacing the combustion chamber requires long downtimes and high repair costs.
  • the burner chamber with a nozzle insert designed as a hollow body, which is fastened in the burner housing and encloses the nozzle opening.
  • the insert is preferably made of a more heat-resistant material than the other parts of the combustion chamber.
  • a combustion chamber known from US Pat. No. 3,320,999 consists of a housing and a hollow insert made of ceramic material, which are arranged in a metal housing.
  • the hollow insert is permanently installed in the burner housing together with the combustion chamber housing. To replace the insert, the entire burner with the combustion chamber must be removed from the system. This leads to long downtimes and correspondingly high repair costs. Due to the fixed installation of the ceramic combustion chamber in the metal housing, there is a risk that the combustion chamber due to high temperatures Thermal expansion of the chamber is mechanically overloaded and breaks.
  • a burner chamber with a housing made of refractory stone with an axial tunnel is known, which tapers towards the entrance and is widened in the central section.
  • An insert is installed at the outlet end, which forms a tapered outlet nozzle.
  • the insert is aligned with the tunnel axis and connected to the tunnel housing by fire-resistant material.
  • the connection between the insert and the housing can come loose under the action of high temperatures and as a result of heat exchange. This has the consequence that the insert falls out of its use position following the tunnel in the event of overpressure in the combustion chamber and / or due to vibrations of the system.
  • the invention is therefore based on the object of equipping a combustion chamber with an insert such that the insert is reliably fixed in the combustion chamber housing and can nevertheless be replaced quickly and inexpensively.
  • Hollow body-shaped insert piece which surrounds a nozzle opening adjoining the tunnel and is coaxial to the housing axis and is delimited by end faces perpendicular to the housing axis, is provided according to the invention for solving this task that the insert piece is aligned on a longitudinal axis which is oblique to the two end faces and below runs at an acute angle to the housing axis.
  • the design of the combustion chamber according to the invention ensures that the insert is securely anchored in the housing.
  • the insert is held wedged by gravity on the one hand and by operating tilting moments on the other in the seat in the housing. It is not absolutely necessary to use a fire-resistant fixing agent to fasten the insert in the housing. Therefore, the insert in the combustion camera according to the invention can be exchanged particularly easily.
  • the invention achieves a longer operating time of the combustion chamber, a reduction in operating costs and an increase in the performance of the system due to shorter downtimes when repairing or replacing the combustion chamber.
  • the insert is arranged in the housing such that its longitudinal axis intersects the housing axis at a point which is spaced from the inner end face of the insert against the flow direction of the combustion products.
  • the insert is preferably arranged in the housing so that its axis extends at an acute angle between 3 and 30 ° to the axis of the housing. Within this angular range, a secure attachment of the insert in the housing with reasonable housing dimensions is guaranteed.
  • intersection of the axis of the insert and the housing should preferably be shifted relative to the inner face by an amount whose ratio to the maximum diameter of the inner face of the insert is in the range from 1.9 to 0.17. This also achieves better anchoring of the insert due to a favorable ratio between the dimensions of the insert and those of the housing of the combustion chamber.
  • the insert can also be arranged in the housing so that the intersection of its axis with that of the housing lies in the plane of the inner end face of the insert.
  • the combustion chamber 1 is shown in longitudinal section with a housing 2, in which an axial tunnel 3 runs.
  • an insert 4 designed as a hollow body with a nozzle opening 5 which is arranged coaxially to the longitudinal axis 11 of the housing 2.
  • the insert 4 has an essentially cylindrical lateral surface (section III-III according to FIG. 3), the cylinder axis 14 of which is inclined at an acute angle against the housing axis 11.
  • An inner end face 6 and an outer end face 7 of the insert 4 lie in planes running perpendicular to the housing axis 11; the end faces 6 and 7 therefore have an elliptical shape (section II-II according to FIG. 2) and run obliquely to the longitudinal axis of the insert.
  • the insert 4 is installed in the housing 2 such that its axis 14 intersects the housing axis 11 approximately in the plane of the inner end face 6 (upstream of the combustion products) of the insert at an acute angle oL.
  • the axis 14 of the insert 4 is shifted upward by a dimension “e”, the intersection of the axis 14 of the insert 4 with the axis 11 of the housing 2 against the flow direction of the combustion products relative to the end face 6 is shifted.
  • the material mass of the insert above the nozzle opening 5, which is coaxial with the housing axis 11, is thereby substantially larger than the material mass below the nozzle opening 5.
  • the tilting moment M presses the insert 4 against the complementary seat in the housing 2 and is effective in the clockwise direction.
  • the force component P s counteracts slipping of the insert 4 out of the housing 2. If it slipped out of the housing seat, the insert 4 would have to perform an upward movement, so that gravity would have to be overcome in addition to the frictional force.
  • the angle of inclination ⁇ of the axis 14 of the insert 4 When choosing the angle of inclination ⁇ of the axis 14 of the insert 4 to the axis 11 of the combustion chamber 1, the following must be taken into account: the smaller the angle o (is, the smaller the tilting moment M and the stroke movement of the insert 4 when displacing is the support of the insert in the seat opening of the housing 2. If, however, the angle ⁇ is greater, so is the grip of the insert 4 in the seat opening is greater. However, the material thickness of the housing 2 to adhere to the extent permitted by L 1 in this case must and L 2 are enlarged so that the housing 2 cannot tear open at the thinnest points. When the angle of inclination is increased, the stress also increases in the acute-angled transition region B of the housing 2. In addition, difficulties arise in the shaping of the insert 4 when the angle ⁇ Studies have shown that a sufficiently favorable effect ensures an angle ⁇ ⁇ 3 ° t is. An optimal effect is achieved in an angle range of ⁇ between 5 and 15 °
  • the axis 14 of the insert 4 can be shifted to the tunnel axis 11 by the size e / D ⁇ (1-d 1 / D): 2.
  • e displacement of the axis of the insert 4 upwards.
  • the thickness of the wall of the insert 4 in the lower part becomes almost zero. Therefore, this value should be considered as a limit.
  • the limit value for the shift e / d 0.15.
  • the insert 4 and the complementary seat in the housing 2 are flattened on one side in order to prevent the insert 4 from rotating about its axis 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP85113163A 1984-10-20 1985-10-17 Chambre de combustion Expired - Lifetime EP0180098B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843438611 DE3438611A1 (de) 1984-10-20 1984-10-20 Brennkammer
DE3438611 1984-10-20

Publications (3)

Publication Number Publication Date
EP0180098A2 true EP0180098A2 (fr) 1986-05-07
EP0180098A3 EP0180098A3 (en) 1988-03-23
EP0180098B1 EP0180098B1 (fr) 1990-12-12

Family

ID=6248463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113163A Expired - Lifetime EP0180098B1 (fr) 1984-10-20 1985-10-17 Chambre de combustion

Country Status (3)

Country Link
EP (1) EP0180098B1 (fr)
JP (1) JPS61180817A (fr)
DE (2) DE3438611A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5013507A (en) * 1989-09-29 1991-05-07 The Boeing Company Method for producing an elongate passage within a component

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554486A (en) * 1947-09-30 1951-05-29 Armstrong Cork Co Method for producing fibrous material
US3320999A (en) * 1965-03-15 1967-05-23 Owens Corning Fiberglass Corp Internal combustion burner
LU60094A1 (fr) * 1969-12-24 1971-08-17
GB2069683A (en) * 1979-12-19 1981-08-26 Southwire Co A method and burner apparatus for heating a non-ferrous metal charge with liquid fuel

Also Published As

Publication number Publication date
JPS61180817A (ja) 1986-08-13
EP0180098B1 (fr) 1990-12-12
EP0180098A3 (en) 1988-03-23
DE3438611C2 (fr) 1987-08-20
DE3438611A1 (de) 1986-04-24
JPH0335567B2 (fr) 1991-05-28
DE3580896D1 (de) 1991-01-24

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