EP1627093A1 - Tube radiant pour fours de craquage - Google Patents

Tube radiant pour fours de craquage

Info

Publication number
EP1627093A1
EP1627093A1 EP04733228A EP04733228A EP1627093A1 EP 1627093 A1 EP1627093 A1 EP 1627093A1 EP 04733228 A EP04733228 A EP 04733228A EP 04733228 A EP04733228 A EP 04733228A EP 1627093 A1 EP1627093 A1 EP 1627093A1
Authority
EP
European Patent Office
Prior art keywords
tube
radiant tube
weight
yttrium
tantalum
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Withdrawn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
EP04733228A
Other languages
German (de)
English (en)
Inventor
Roger Berglund
Mats Lundberg
Claes ÖHNGREN
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.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property 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 Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Publication of EP1627093A1 publication Critical patent/EP1627093A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
    • C10G9/18—Apparatus
    • C10G9/20—Tube furnaces
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

Definitions

  • the present disclosure relates to a radiant tube formed of a material that meets requirements such as creep strength, ductility and service life in cracking furnaces, preferably furnaces for ethylene cracking.
  • H 2 C H 2 C, which constitutes a raw material for the plastics industry.
  • the cracking takes place by hydrocarbons being led through a radiant tube, which has been heated by means of surrounding burner to sufficiently high temperature, for instance, about 1,100 °C, for ethylene being formed in the tube.
  • the tube usually is made from a FeCrAl material.
  • a dense aluminum oxide Al O is formed on the outside and inside of the tube. This oxide prevents Fe contacting the gas flowing in the tube when Fe acts as a catalyst for coke formation in the tube. If coke is formed in the tube, the same is deposited on the inside of the tube, the flow of gas in the tube becoming smaller and the heat transfer to the interior of the tube becoming lower. Coke may also entirely clog the tube.
  • a FeCrAl material where it is stated that the creep strength is increased by the fact that the material is alloyed with cobalt, nickel, silicon, manganese, zirconium and titanium as well as a small quantity of yttrium and hafnium, and then the material is heat-treated at minimum 1050 °C until very elongate granules are formed having a length of at least 5 mm and a ratio of length to cross-section of at least 10 to 1. Radiant tubes are manufactured from this material.
  • the present disclosure relates to a radiant tube in a cracking furnace, where hydrocarbons are cracked into ethylene in a tube through which hydrocarbons flow, which tube is heated from the outside to a temperature where cracking of hydrocarbons occurs, and is characterized in that the tube is made from a FeCrAl material containing, in addition to Fe, 10 to 25% by weight of Cr, 1 to 10% by weight of Al and 1.5 to 5% by weight of Mo.
  • the material comprises up to a total of 2.2 wt.%, preferably up to 2.0 wt.% and more preferably up to 1.0 wt.%, of one or more alloying materials selected from the group consisting of tantalum, hafnium, zirconium, yttrium, mtrogen, carbon and oxygen.
  • a radiant tube is found in a cracking furnace, where hydrocarbons are cracked into ethylene in a tube through which hydrocarbons flow.
  • the tube is heated from the outside to a temperature where cracking occurs.
  • the temperature of the tube, at the inlet end of the gas is 900 °C and at the outlet end 1,125 °C.
  • the tube is made from a FeCrAl material containing, in addition to Fe, 10 to 25% by weight of Cr, 1 to 10% by weight of Al and 1.5 to 5% by weight of Mo.
  • the material contains smaller fractions of one or more of the alloying materials, tantalum, hafnium, zirconium, yttrium, nitrogen, carbon and oxygen.
  • the material comprises up to a total of 2.2 wt.%), preferably up to 2.0 wt.% and more preferably up to 1.0 wt.%, of one or more alloying materials selected from the group consisting of tantalum, hafi ium, zirconium, yttrium, nitrogen, carbon and oxygen.
  • the material contains 2 to 3.5% by weight of molybdenum.
  • the tube is made from a material having a creep strength high enough that the time to brealc of the tube at a temperature of 1,100 °C and a load of 2.2 MPa exceeds 100,000 hours. This corresponds to substantially a twice as high a creep strength in comparison with tubes made from the material disclosed in the Swedish Patent No. 467 414.
  • a cracker tube may typically be 10 to 17 meters long.
  • Such a tube consists of two or more tubes welded together in the longitudinal direction. According to a preferred embodiment, the tube is formed in one piece having a length exceeding 10 meters.
  • Additional exemplary embodiments of the tube may be varied in respect of the material composition, above all regarding alloying materials having a low percentage in the material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)

Abstract

L'invention concerne un tube radiant pour four de craquage. Des hydrocarbures sont craqués dans l'éthylène dans un tube à travers lequel s'écoulent lesdits hydrocarbures, le tube étant chauffé à partir de l'extérieur à une température à laquelle le craquage peut de produire. Ledit tube est composé d'un matériau de FeCrAl contenant en plus du Fe, 10 à 25 % en poids de Cr, 1 à 10 % en poids de Al et 1,5 à 5 % en poids de Mo. Le matériau peut comprendre, éventuellement, jusqu'à un total de 2,2 % en poids, de préférence jusqu'à 2,0 % en poids et idéalement jusqu'à 1,0 % en poids d'au moins un matériau d'alliage sélectionné dans le groupe constitué le tantale, le hafnium, le zirconium, l'yttrium, l'azote, le carbone et l'oxygène.
EP04733228A 2003-05-20 2004-05-14 Tube radiant pour fours de craquage Withdrawn EP1627093A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0301500A SE524010C2 (sv) 2003-05-20 2003-05-20 Strålningsrör i krackerugn
PCT/SE2004/000757 WO2004104257A1 (fr) 2003-05-20 2004-05-14 Tube radiant pour fours de craquage

Publications (1)

Publication Number Publication Date
EP1627093A1 true EP1627093A1 (fr) 2006-02-22

Family

ID=20291377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04733228A Withdrawn EP1627093A1 (fr) 2003-05-20 2004-05-14 Tube radiant pour fours de craquage

Country Status (6)

Country Link
US (1) US20050019202A1 (fr)
EP (1) EP1627093A1 (fr)
JP (1) JP2007506866A (fr)
CN (1) CN100365151C (fr)
SE (1) SE524010C2 (fr)
WO (1) WO2004104257A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20040040A1 (it) * 2004-01-15 2004-04-15 Maurizio Spoto Elemento scambiatore a scambio termico incrementato
SE528189C2 (sv) * 2004-12-21 2006-09-19 Sandvik Intellectual Property Förfarande samt rörfog för hopfogning av komponenter som innefattar eller är gjort av ett material som är svårt att svetsa
SE529444C2 (sv) * 2005-12-02 2007-08-14 Sandvik Intellectual Property Rör och användning av röret
EP2031080B1 (fr) * 2007-08-30 2012-06-27 Alstom Technology Ltd Alliage résistant aux températures élevées
PL2198065T3 (pl) 2007-10-05 2018-08-31 Sandvik Intellectual Property Ab Stal umocniona dyspersyjnie jako materiał w rolce dla pieca z trzonem samotokowym
CN102230132B (zh) * 2011-07-04 2012-11-21 大连理工大学 一种Fe-Cr-Mo-Al-Cu耐蚀高温合金
CN210287474U (zh) * 2019-06-01 2020-04-10 上海颐柏科技股份有限公司 一种基于辐射管的甲醇和丙烷裂解装置
CN117144264B (zh) * 2023-10-31 2024-02-02 上海核工程研究设计院股份有限公司 轻水反应堆燃料组件用铁素体耐热合金、制造方法与应用

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT131135B (de) * 1930-08-27 1933-01-10 Ver Stahlwerke Ag Krackvorrichtung.
US4498928A (en) * 1984-02-06 1985-02-12 The United States Of America As Represented By The Secretary Of Interior Ductile duplex iron-based alloy containing aluminum
SE469754B (sv) * 1990-05-14 1993-09-06 Kanthal Ab Ugn foer krackning av kolvaeten
JPH04354850A (ja) * 1991-05-29 1992-12-09 Nisshin Steel Co Ltd 耐高温酸化性に優れた高Ａｌ含有フェライト系ステンレス鋼
JPH0941096A (ja) * 1995-08-04 1997-02-10 Mitsubishi Heavy Ind Ltd タービン用翼材料
SE508595C2 (sv) * 1997-08-12 1998-10-19 Sandvik Ab Användning av en ferritisk Fe-Cr-Al-legering vid framställning av kompoundrör, samt kompoundrör och användning av röret
JP4281881B2 (ja) * 1997-08-20 2009-06-17 日揮株式会社 加熱炉管および加熱炉管の製造方法
TW548334B (en) * 1997-08-20 2003-08-21 Jgc Corp Heating furnace and method of manufacturing the same
JPH11209850A (ja) * 1998-01-23 1999-08-03 Jgc Corp 加熱炉管および加熱炉管の使用方法
SE0000002L (sv) * 2000-01-01 2000-12-11 Sandvik Ab Förfarande för tillverkning av ett FeCrAl-material och ett sådant marerial

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004104257A1 *

Also Published As

Publication number Publication date
US20050019202A1 (en) 2005-01-27
WO2004104257A1 (fr) 2004-12-02
JP2007506866A (ja) 2007-03-22
SE0301500D0 (sv) 2003-05-20
SE0301500L (sv) 2004-06-15
CN1802447A (zh) 2006-07-12
SE524010C2 (sv) 2004-06-15
CN100365151C (zh) 2008-01-30

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