EP2048217A2 - Procédé de décocage de fours de craquage - Google Patents

Procédé de décocage de fours de craquage Download PDF

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Publication number
EP2048217A2
EP2048217A2 EP08017417A EP08017417A EP2048217A2 EP 2048217 A2 EP2048217 A2 EP 2048217A2 EP 08017417 A EP08017417 A EP 08017417A EP 08017417 A EP08017417 A EP 08017417A EP 2048217 A2 EP2048217 A2 EP 2048217A2
Authority
EP
European Patent Office
Prior art keywords
decoking
furnace
gas
cracking
cyclone separator
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.)
Ceased
Application number
EP08017417A
Other languages
German (de)
English (en)
Other versions
EP2048217A3 (fr
Inventor
Gerhard Dr. Merz
Robert Stegemann
Christopher Eberstein
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of EP2048217A2 publication Critical patent/EP2048217A2/fr
Publication of EP2048217A3 publication Critical patent/EP2048217A3/fr
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00—Preventing or removing incrustations
    • C10B43/02—Removing incrustations
    • C10B43/10—Removing incrustations by burning out
    • 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
    • C10G70/00—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
    • 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
    • C10G9/16—Preventing or removing incrustation

Definitions

  • the invention relates to a process for the decoking of a cracking furnace for the thermal cracking of hydrocarbons, in which a Entkokungsgas is passed through verkokte plant parts, wherein a decoking exhaust gas is formed.
  • the thermal cracking of hydrocarbons is of great industrial importance.
  • cracking furnaces with at least one convection and radiation zone are used.
  • the actual thermal splitting is carried out in the burner-heated radiation zone, while in the convection zone, the hydrocarbons and other fluids are heated by arranged there heat exchanger against the flue gas.
  • hydrocarbon and process steam are preheated in the heat exchangers of the convection zone and fed to the arranged in the radiation zone coils a hydrocarbon / vapor mixture.
  • the generated cracking gases are rapidly cooled to stop the reactions.
  • Such splitting methods and cracking furnaces are for example made DE 2830824 and DE 2854061 known.
  • the resulting decoke exhaust gas may e.g. Peak levels up to about 20,000 ppm by volume of carbon monoxide in dry exhaust gas. An immediate release of this Entkokungsabgases to the atmosphere should therefore be avoided for environmental reasons.
  • EP 0497155 proposed not to lead the decoke exhaust gas into the furnace but to a catalytic treatment.
  • a catalyst for the oxidation of incompletely combusted components in the decoking exhaust gas the process is simplified.
  • the carbon monoxide and other unburned components in the decoke exhaust gas are further reduced, but the mechanically discharged deposits remain in the decoke exhaust gas.
  • the present invention is therefore based on the object to develop an alternative method for decoking a cracking furnace.
  • the present object is achieved in that the Entkokungsabgas is recycled via a cyclone separator in the furnace of the cracking furnace or is led to a catalytic treatment, wherein the majority of solid particles in the cyclone separator is removed from the Entkokungsabgas.
  • a decoking gas is passed through the coked plant parts during a cleaning phase, whereby a decoking off-gas is produced.
  • the resulting decoking exhaust gas contains beside Oxygen, nitrogen and water vapor predominantly coke particles (dust particles), carbon monoxide and carbon dioxide.
  • the decoke exhaust gas is first passed through a cyclone separator.
  • solid components may be separated from gaseous parts. In Zyklonabscheider therefore the majority of solid particles (coke particles, dust particles) is removed from the Entkokungsabgas.
  • the gaseous part of the Entkokungsabgases is performed by the cyclone in a suitable manner in the furnace of the cracking furnace, where at the prevailing temperatures carbon monoxide is almost completely converted into carbon dioxide and a large combustion of the non-deposited coke particles.
  • the gaseous portion of the decoking exhaust gas may be passed from the cyclone separator to a catalytic treatment.
  • the catalytic treatment oxidation
  • carbon monoxide is converted to carbon dioxide.
  • the decoke exhaust gas, as it ultimately leaves the cracking furnace or the catalytic treatment is therefore almost free of solid particles such as coke particles and almost free of carbon monoxide.
  • the process according to the invention thus represents an environmentally friendly alternative to the decoking of cracking furnaces.
  • water is injected into the decoking exhaust gas upstream of the cyclone separator.
  • the separation efficiency of the cyclone separator is significantly improved.
  • the emission of dust or coke particles can thus be further reduced.
  • the solid particles of the decoking exhaust gas can be humidified by the regular injection of water, whereby the separation of the solid particles is improved by the cyclone.
  • FIG. 1 shows a radiation zone (1 a) and convection zone (1 b) existing cracking furnace (1).
  • a mixture of air and water vapor is sent into the cracking tubes (2) and the subsequent quenching gas coolers (3).
  • the radiation zone (1a) of the cracking furnace (1) is kept at a temperature of about 1100 ° C. via the burners (4).
  • the Entkokungsabgas (5) resulting in the crevices is directed to a cyclone separator (6). Before the cyclone separator (6) water (7) is injected into the Entkokungsabgas (5) at regular intervals.
  • FIG. 2 shows an embodiment of the invention with a catalytic treatment.
  • the Entkokungsabgas (5) produced in the crevices is passed into a cyclone separator (6) after regular humidification (7), where from the Entkokungsabgas (5) solid components such as coke and dust particles (8) are separated out.
  • the decoking exhaust gas (9) freed from solid components is passed into a catalytic treatment (11), where carbon monoxide is oxidized to carbon dioxide and the remaining coke particles at temperatures dependent on the respective catalyst.
  • the exhaust gas flow guided into the smoke outlet (10) is thus now freed from coke or dust particles and also carbon monoxide.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP08017417A 2007-10-12 2008-10-02 Procédé de décocage de fours de craquage Ceased EP2048217A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710048984 DE102007048984A1 (de) 2007-10-12 2007-10-12 Verfahren zur Entkokung von Spaltöfen

Publications (2)

Publication Number Publication Date
EP2048217A2 true EP2048217A2 (fr) 2009-04-15
EP2048217A3 EP2048217A3 (fr) 2012-06-06

Family

ID=40298632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08017417A Ceased EP2048217A3 (fr) 2007-10-12 2008-10-02 Procédé de décocage de fours de craquage

Country Status (2)

Country Link
EP (1) EP2048217A3 (fr)
DE (1) DE102007048984A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103965947A (zh) * 2013-02-06 2014-08-06 中国石油化工集团公司 一种裂解炉炉体结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2830824A1 (de) 1978-07-13 1980-01-24 Linde Ag Verfahren zum spalten von kohlenwasserstoffen
DE2929316A1 (de) 1978-08-04 1980-02-28 Schroeder Wilburn C Kontinuierliches verfahren zur hydrierung von kohle
DE2854061A1 (de) 1978-12-14 1980-07-03 Linde Ag Verfahren zum vorwaermen von kohlenwasserstoffen vor deren thermischer spaltung
EP0021167A1 (fr) 1979-06-08 1981-01-07 Linde Aktiengesellschaft Procédé et dispositif pour le décokage thermique d'un réacteur de craquage thermique d'hydrocarbures, le reacteur comportant une zone de craquage et un refroidisseur pour le gaz de craquage
EP0036151A1 (fr) 1980-03-15 1981-09-23 BASF Aktiengesellschaft Procédé de décokage de refroidisseurs de gaz craqués
WO1990012851A1 (fr) 1989-04-14 1990-11-01 Procedes Petroliers Et Petrochimiques Procede et appareillage pour le decokage d'une installation de vapocraquage
EP0497155A1 (fr) 1991-01-31 1992-08-05 Linde Aktiengesellschaft Procédé de décokéfaction de fours de pyrolyse
EP1087007A2 (fr) 1999-09-22 2001-03-28 Technip Italy S.p.A. Procédé et appareillage pour la reduction de poussière de coke dans les effluents lors du décokage des fours de craquage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652817B1 (fr) * 1989-10-06 1993-11-26 Procedes Petroliers Petrochimiqu Procede et installation de vapocraquage d'hydrocarbures, a recyclage de particules solides erosives.
US5266169A (en) * 1992-06-03 1993-11-30 Praxair Technology, Inc. Apparatus for separating and recycling cleaning particles for cleaning furnace tubes

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2830824A1 (de) 1978-07-13 1980-01-24 Linde Ag Verfahren zum spalten von kohlenwasserstoffen
DE2929316A1 (de) 1978-08-04 1980-02-28 Schroeder Wilburn C Kontinuierliches verfahren zur hydrierung von kohle
DE2854061A1 (de) 1978-12-14 1980-07-03 Linde Ag Verfahren zum vorwaermen von kohlenwasserstoffen vor deren thermischer spaltung
EP0021167A1 (fr) 1979-06-08 1981-01-07 Linde Aktiengesellschaft Procédé et dispositif pour le décokage thermique d'un réacteur de craquage thermique d'hydrocarbures, le reacteur comportant une zone de craquage et un refroidisseur pour le gaz de craquage
EP0036151A1 (fr) 1980-03-15 1981-09-23 BASF Aktiengesellschaft Procédé de décokage de refroidisseurs de gaz craqués
WO1990012851A1 (fr) 1989-04-14 1990-11-01 Procedes Petroliers Et Petrochimiques Procede et appareillage pour le decokage d'une installation de vapocraquage
US5186815A (en) 1989-04-14 1993-02-16 Procedes Petroliers Et Petrochimiques Method of decoking an installation for steam cracking hydrocarbons, and a corresponding steam-cracking installation
EP0497155A1 (fr) 1991-01-31 1992-08-05 Linde Aktiengesellschaft Procédé de décokéfaction de fours de pyrolyse
EP1087007A2 (fr) 1999-09-22 2001-03-28 Technip Italy S.p.A. Procédé et appareillage pour la reduction de poussière de coke dans les effluents lors du décokage des fours de craquage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103965947A (zh) * 2013-02-06 2014-08-06 中国石油化工集团公司 一种裂解炉炉体结构
CN103965947B (zh) * 2013-02-06 2015-10-28 中国石油化工集团公司 一种裂解炉炉体结构

Also Published As

Publication number Publication date
DE102007048984A1 (de) 2009-04-16
EP2048217A3 (fr) 2012-06-06

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