EP0727631B1 - Stahlrohr für Industrieöfen - Google Patents

Stahlrohr für Industrieöfen Download PDF

Info

Publication number
EP0727631B1
EP0727631B1 EP96100133A EP96100133A EP0727631B1 EP 0727631 B1 EP0727631 B1 EP 0727631B1 EP 96100133 A EP96100133 A EP 96100133A EP 96100133 A EP96100133 A EP 96100133A EP 0727631 B1 EP0727631 B1 EP 0727631B1
Authority
EP
European Patent Office
Prior art keywords
radiant tube
ceramic
sleeve
jet pipe
flange part
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.)
Expired - Lifetime
Application number
EP96100133A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0727631A1 (de
Inventor
Joachim Dr.-Ing. Wünning
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.)
WS Warmeprozesstechnik GmbH
Original Assignee
WS Warmeprozesstechnik GmbH
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 WS Warmeprozesstechnik GmbH filed Critical WS Warmeprozesstechnik GmbH
Publication of EP0727631A1 publication Critical patent/EP0727631A1/de
Application granted granted Critical
Publication of EP0727631B1 publication Critical patent/EP0727631B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/051—Heat exchange having expansion and contraction relieving or absorbing means
    • Y10S165/052—Heat exchange having expansion and contraction relieving or absorbing means for cylindrical heat exchanger
    • Y10S165/053—Flexible or movable header or header element
    • Y10S165/057—Flexing tubesheet

Definitions

  • jet pipes For the indirect heating or cooling of industrial furnaces so-called jet pipes are often used, which are built through openings in the furnace wall and there be sealed. Burners or Electric heaters, for heat dissipation cooling systems that are in the Jet pipe can be used.
  • As a material for the Beam tubes are often used in heat-resistant steel, increasingly also ceramics, because of the higher ones Temperature limit.
  • a ceramic flange is attached to the Beam pipe clamped between two metallic flanges, one of which is gas-tight connected to the furnace housing is.
  • up to temperatures of around 250 ° C are elastic Seals available that have the different expansion catch the flanges made of metal and ceramic. The contact pressure is often applied by spring elements.
  • Seals made of a relatively rigid material, e.g. E.g. metal rings, be used. They require defined surfaces on the ceramic flange attachment, i.e. an expensive one Grinding operation in its manufacture. There is also the risk of stress cracks in the ceramic, because the Contact forces with stiff seals must be high.
  • the temperatures on the flange are usually above 250 ° C, especially if at this point hot gases from Flow the burner or cooling system.
  • the US-PS 3747206 also known the outer metal tube of the heating element with pressed-on metal sleeves to understand.
  • the metal sleeves can have a radially extending one have collar-like section, which as Contact surface for a seal is used. So that can be done Mount the heating element on a sealed container wall.
  • An industrial burner is known from DE 41 32 236 C1 a ceramic jet pipe known in which the subject Pipe with a ceramic flange insert with an intermediate layer of a sealing ring on an inner shoulder of a tubular housing part is pressed.
  • a second sealing ring provided in one of the tubular housing part and the ceramic jet pipe limited annular gap is. Springs arranged inside the burner head press the ceramic jet pipe with its flange attachment to seal against the ones supported on the inner shoulder Sealing ring.
  • sealing rings are under heat load of over 250 ° C metal rings used, which is a ground Require flange approach.
  • the US-PS 3747206 also known the outer metal tube of the heating element with pressed-on metal sleeves to understand.
  • the metal sleeves can have a radially extending one have collar-like section, which as Contact surface for a seal is used. So that can be done Mount the heating element on a sealed container wall.
  • the ceramic jet pipe has a metallic one Flange part on that easily with one on a furnace wall provided flange can be screwed.
  • the arranged between the flange part and the jet pipe metallic sleeve acts both as a sealing device, as well as a holding device in relation to axial forces.
  • the one on the relevant end of the ceramic jet pipe shrunk-on section forms a with the jet pipe essentially gas-tight connection.
  • the sleeve is thin-walled i.e. it has a much smaller wall thickness on than the jet pipe.
  • the jet pipe, its wall thickness is between 4 and 10 mm, on the other hand, is stiff.
  • the Sleeve fits therefore when shrinking the outer Shape of the jet pipe, so that grinding work of the jet pipe can be omitted. Minor surface irregularities of the nozzle are tolerated because the Sleeve adapts to this. Can too Diameter tolerances or deviations from roundness of the jet pipe balanced to a certain extent become. The compressive stresses that arise during shrinking tolerates the ceramic well
  • the sleeve creates a robust connection to the Flange.
  • the connection is also to a certain extent Completely flexible, so that different thermal Expansion of the jet pipe and the flange part do not lead to stress cracks or leaks. In particular the jet pipe becomes with all occurring temperature differences kept free of larger tensile stresses.
  • the sleeve is with its first and second sections each formed tubular, the second section expanded from the first section.
  • the second section presents with its enlarging Diameter a transition member to the flange part with a larger inner diameter. Differences in expansion coefficients of the jet pipe and the flange part become special of the second section of the sleeve well balanced if the second section at least is partially conical.
  • a simple arrangement results when the sleeve lies with its second section from the flange part. To shorten the overall length, it is also possible to section of the sleeve connected to the flange part around the first section shrunk onto the jet pipe the sleeve. The second section lies then substantially concentric with the first section the sleeve.
  • the jet pipe is made of silicon carbide ceramic. This is extremely heat-resistant. However, it has one relatively high thermal conductivity, so that the in the end of the sleeve is heated relatively strongly. This warming holds the shrink connection between the sleeve and the nozzle, however, easily stood.
  • Beam pipe has a wall thickness of 4 to 7 mm. In contrast, the wall thickness of the sleeve is less than 1 mm, so that this is made elastic in comparison to the jet pipe and acts as a spring element.
  • the sleeve has a coefficient of expansion has in the relevant temperature range is less than or equal to that of the ceramic used.
  • the shrink connection is at all temperatures equally firm, or increases in strength higher temperatures.
  • Particularly advantageous are iron-nickel alloys with a low coefficient of expansion.
  • a sealant can be between the second section and the jet pipe are introduced.
  • a sealant is particularly suitable for this elevated temperatures, such as graphite, or a solder.
  • the sleeve fixes the jet pipe in the axial direction.
  • a support tube can also be provided, that of the welded to the sleeve or otherwise connected flange part and coaxial to the support tube is arranged. It is advantageous if that Support pipe with an annular gap limited with the jet pipe, see above that there is some radial play. This Game prevents tension from being introduced into the Jet pipe, which could lead to its destruction. It is advantageous if the annular gap from the Sleeve narrowed away so that the support tube one in the area its mouth area for the spray lance having. This will act on the jet pipe Bending moment between the mouth of the support tube and the Sleeve derived. Then almost the entire lever arm stands Length of the support tube available, which makes the resulting forces acting on the jet pipe bearable stay. In particular, they are smaller than reaction forces, when clamping the ceramic jet pipe occur only at its mouth.
  • the jet pipe is advantageous for heating a Furnace room with protective gas atmosphere can be used. It serves with its flange part separating two gas spaces, the Furnace room and the surrounding area.
  • the jet pipe is included its flange part screwed to a flange that a provided in a corresponding furnace wall, from the jet pipe penetrated opening is arranged.
  • FIG. 1 an industrial furnace 1 is shown, the Furnace chamber 2 through on its furnace wall 3 in a corresponding Opening 5 provided radiant tubes 7 indirectly heated is.
  • the jet pipe 7 passes through the in the furnace wall 3 provided opening 5 and is at one on the furnace wall provided flange 8 attached. That at his in the furnace chamber 2 protruding end is closed jet pipe 7 connected to a burner 11 at its open end 9, the connections 13, 15 for supplying fuel gas and air, and has a connection 17 for discharging flue gas.
  • the connection 17 is with an annular exhaust gas chamber 19 of a tubular housing part 21 in Connection, so that an exhaust duct delimited by the jet pipe 7 in the exhaust chamber located in the housing part 21 19 opens.
  • the jet pipe 7 is heated by combustion of the fuel gas supplied at 22, causing hot, Exhaust gases emerging from the jet pipe 7 are formed at the end 9.
  • a flange part 23 For connecting the jet pipe 7 to the furnace wall 3 or the flange 8 is provided with a flange part 23 thin-walled sleeve 25 provided, in detail 2 can be seen.
  • the flange part 23 sits concentrically to the rotationally symmetrical with respect to one Longitudinal center axis 27 formed beam tube 7.
  • the Flange part 23 has the shape of an annular disc and at 29 goes into a coaxial to the longitudinal central axis 27 extending support tube 30 over.
  • the support tube 30 is outgoing of the flange part 23 initially with a hollow cylinder a clearly exceeding the diameter of the jet pipe 7 Diameter formed.
  • the ceramic one Beam pipe 7 a diameter of 50 to 250 mm and one Has a wall thickness of 3 to 10 mm, usually 4 to 7 mm, shows that made of a metal such as steel Support tube 30 a comparable wall thickness, however a larger diameter by a few millimeters.
  • the Ratio of the wall thickness of the sleeve 25 to that of the jet pipe 7 is 1/10. Therefore, the sleeve 25 is related elastic on the thick-walled, rigid jet pipe 7.
  • to Connection to the jet pipe 7 is the sleeve 25 with a provided first, hollow-cylindrical section 40, which is shrunk onto the jet pipe 7. This means that the inside diameter of section 40 is smaller than the outside diameter of the jet pipe 7.
  • the section 40 of the sleeve 25 goes into a conical section 42, to which a hollow cylindrical section 44 and connect another conical section 46.
  • the Sleeve 25 is at its section 46 with the flange part 23 welded at a weld seam 48. This leads along of the entire inner circumference of the flange part 23 limited opening so that the sleeve 25, the jet pipe 7th seals gas-tight against the flange part 23.
  • the flange part 23 has in the immediate vicinity the weld 46 an axial annular groove 47, the welding the sleeve 25 to the flange part 23 facilitates.
  • the springy Sleeve 25 consists of a nickel-iron alloy, whose coefficient of thermal expansion is equal to or less is the coefficient of thermal expansion of the jet pipe 7. This keeps the gas tight by shrinking made connection between the section 40 of the sleeve 25 and the jet pipe 7 even when the End 9 of the jet pipe 7 obtained at temperatures that are greater than 300 ° C. Regardless of the temperature of the Jet pipe 7 exercises the elastically stretched portion 40 of the Sleeve 25 has a radially inward pressure force the jet pipe 7, which is easily taken up by this becomes.
  • a additional sealant between section 40 and the Beam pipe 7 are provided.
  • Graphite powder is used as a sealant or a solder.
  • the flange part 23 is fixed between the Oven wall 3 connected flange 8 and one on the housing part 21 provided flange 52 held.
  • flange 52 For connection of the flange part 23 with the flanges 8, 52 serve in 2 only schematically indicated screws 55.
  • the sealing of the jet pipe 7 against the furnace chamber 6 is provided in a simple manner by the sleeve 25, without the jet pipe 7 requiring special finishing, and without this being in danger of breaking.
  • the seal is reliable and safe, so that none Operating temperature exhaust gases or gases from the furnace atmosphere can penetrate to the outside. Differences in temperature-dependent Extentions between the annular flange part 23 and the jet pipe 7 are compensated by the sleeve 7. This non-rigid clamping offers a good one Protection against stress cracks in the jet pipe 7.
  • Das Flange part 23 consists of metal, for example steel, and can with the interposition of temperature-resistant seals 56, 57 easily against the neighboring ones, also made of metal seal existing flanges 56, 57.
  • the support tube 30 serves with his hollow cylindrical section 33 of the absorption of bending moments. Due to the dimensioning of section 33 in such a way that this at any temperature for which the jet pipe 7th is provided, the jet pipe 7 holds with play, generated section 33 no thermal stresses for that Nozzle 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP96100133A 1995-02-17 1996-01-08 Stahlrohr für Industrieöfen Expired - Lifetime EP0727631B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19505401A DE19505401C1 (de) 1995-02-17 1995-02-17 Strahlrohr für Industrieöfen
DE19505401 1995-02-17

Publications (2)

Publication Number Publication Date
EP0727631A1 EP0727631A1 (de) 1996-08-21
EP0727631B1 true EP0727631B1 (de) 2002-08-28

Family

ID=7754251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100133A Expired - Lifetime EP0727631B1 (de) 1995-02-17 1996-01-08 Stahlrohr für Industrieöfen

Country Status (4)

Country Link
US (1) US5762489A (ja)
EP (1) EP0727631B1 (ja)
JP (1) JP3665407B2 (ja)
DE (2) DE19505401C1 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1292577B1 (it) * 1997-05-23 1999-02-08 Worgas Bruciatori Srl Bruciatore di gas cilindrico.
DE19808405A1 (de) * 1998-02-27 1999-09-02 Kromschroeder Prozeswaerme Gmb Strahlrohranordnung
DE19924731C2 (de) * 1999-05-31 2001-07-19 Aichelin Gmbh Halterung zur temperaturbeständigen Festlegung eines Rohres
SE0100948L (sv) * 2001-03-19 2002-09-20 Sandvik Ab Brännare för gas
FR2828731B1 (fr) * 2001-08-14 2004-10-22 Inst Francais Du Petrole Installation de conversion chimique d'une charge presentant une surface reduite d'echange de chaleur
DE202008009065U1 (de) * 2008-07-04 2008-10-09 WS Wärmeprozesstechnik GmbH Strahlungsheizanordnung mit Verzugkompensation
DE102008048972B4 (de) * 2008-09-25 2012-07-12 Ibs Industrie-Brenner-Systeme Gmbh Strahlrohranordnung mit einer Verbindungseinrichtung
US9482140B2 (en) * 2014-05-01 2016-11-01 Electro-Motive Diesel, Inc. Mounting system for aftertreatment component
US10865151B2 (en) 2015-05-19 2020-12-15 Basf Se Gas-tight, heat-permeable multilayer ceramic composite tube

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405152A (en) * 1943-02-20 1946-08-06 Sulzer Ag Packing for cylindrical parts
US2632503A (en) * 1948-04-27 1953-03-24 Standard Oil Dev Co Tubular radiant gas burner
GB957518A (en) * 1959-07-23 1964-05-06 Anneliese Bleckmann Improvements in and relating to the fixing of tubular electric heating elements
DE1565466A1 (de) * 1964-11-16 1969-09-25 Czepek & Co Befestigungsvorrichtung fuer einen von aussen durch eine Behaelteroeffnung einsteckbaren Rohrheizkoerper
US3425675A (en) * 1966-12-14 1969-02-04 Alco Standard Corp Burner tube assembly for heat treating furnace
US3747206A (en) * 1970-05-25 1973-07-24 J Pease Method of making a heating element and fitting assembly
US4134449A (en) * 1976-12-02 1979-01-16 Hague International Bellows sealing arrangement
GB2145482B (en) * 1983-08-22 1986-08-13 Heat Transfer Technology Sealing joints between consenting member
DE4132236C1 (ja) * 1991-09-27 1992-10-15 Ws Waermeprozesstechnik Gmbh, 7253 Renningen, De

Also Published As

Publication number Publication date
EP0727631A1 (de) 1996-08-21
JPH08312924A (ja) 1996-11-26
US5762489A (en) 1998-06-09
DE59609581D1 (de) 2002-10-02
DE19505401C1 (de) 1996-04-04
JP3665407B2 (ja) 2005-06-29

Similar Documents

Publication Publication Date Title
EP0164576B1 (de) Industriebrenner für gasförmige oder flüssige Brennstoffe
EP0727631B1 (de) Stahlrohr für Industrieöfen
EP0534105B1 (de) Industriebrenner mit rekuperativer Luftvorwärmung, insbesondere zur Beheizung von Ofenräumen von Industrieöfen
EP0904512B1 (de) Hitzeschildanordnung, insbesondere für strukturteile von gasturbinenanlagen
EP0171624B1 (de) Abgasleitung für Kraftfahrzeugmotoren
EP0538293A1 (de) Plasmabrenner für übertragenen lichtbogen.
EP0191910B1 (de) Keramisches Flammrohr für das Mantelstrahlheizrohr eines Industriebrenners
CH660700A5 (de) Abschirmvorrichtung fuer einen giessstrahl aus fluessigem material.
DE3844554A1 (de) Verbrennungsluftfuehrung bei einem heissgasmotor
WO2019201654A1 (de) Vorrichtung zur dichtenden verbindung zweier rohrelemente
EP0282497A1 (de) Halterung einer abgasleitung.
EP0759502A1 (de) Ausgleichsanordnung
KR20010024234A (ko) 고온에서 이용하기 위한 롤 조립체 및 그 제조 방법
DE2140401A1 (de) Flammrohr fuer gasturbinen
EP0939270B1 (de) Strahlrohranordnung
DE3700443C2 (ja)
EP0519303B1 (de) Heissluftwärmetauscher
DE19610501A1 (de) Verfahrenstechnische Einrichtung mit perforiertem emaillierten Aufnahmeteil
DE3223082C2 (de) Weichstoffkompensator sowie Verfahren zu dessen Vorwärmen und Kühlen
DE2721663C3 (de) Dichtung zur Abdichtung des Strahlrohres
EP1058050B1 (de) Halterung zur temperaturbeständigen Festlegung eines Rohres
DE19501422A1 (de) Wasserkammer eines Wärmetauschers
JP2874110B2 (ja) 高温用バルブ
EP4122594A1 (de) Wärmetauscher zum kühlen von spaltgas
CH474733A (de) Wärmeaustauscher

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): DE FR GB IT

17P Request for examination filed

Effective date: 19961220

17Q First examination report despatched

Effective date: 19990412

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020828

REF Corresponds to:

Ref document number: 59609581

Country of ref document: DE

Date of ref document: 20021002

ET Fr: translation filed
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: 20030530

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

Ref country code: IT

Payment date: 20120126

Year of fee payment: 17

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

Ref country code: GB

Payment date: 20130122

Year of fee payment: 18

Ref country code: FR

Payment date: 20130213

Year of fee payment: 18

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

Effective date: 20140108

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140930

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

Ref country code: GB

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

Effective date: 20140108

Ref country code: FR

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

Effective date: 20140131

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

Ref country code: DE

Payment date: 20150131

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59609581

Country of ref document: DE

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

Ref country code: IT

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

Effective date: 20140108