EP0396868A1 - Echangeur pour le refroidissement de gaz de craquage - Google Patents

Echangeur pour le refroidissement de gaz de craquage Download PDF

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Publication number
EP0396868A1
EP0396868A1 EP90104494A EP90104494A EP0396868A1 EP 0396868 A1 EP0396868 A1 EP 0396868A1 EP 90104494 A EP90104494 A EP 90104494A EP 90104494 A EP90104494 A EP 90104494A EP 0396868 A1 EP0396868 A1 EP 0396868A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tube
cracked gas
gas
cooling
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
EP90104494A
Other languages
German (de)
English (en)
Other versions
EP0396868B1 (fr
Inventor
Wolfgang Kehrer
Thomas Schreck
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.)
Deutsche Babcock Borsig AG
Original Assignee
Deutsche Babcock Borsig AG
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 Deutsche Babcock Borsig AG filed Critical Deutsche Babcock Borsig AG
Publication of EP0396868A1 publication Critical patent/EP0396868A1/fr
Application granted granted Critical
Publication of EP0396868B1 publication Critical patent/EP0396868B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0075—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for syngas or cracked gas cooling systems
    • 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
    • Y10S165/903—Convection
    • 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
    • Y10S585/00—Chemistry of hydrocarbon compounds
    • Y10S585/949—Miscellaneous considerations
    • Y10S585/95—Prevention or removal of corrosion or solid deposits

Definitions

  • the invention relates to a heat exchanger for cooling cracked gas with the features of the preamble of claim 1.
  • the cracked gas generated by thermal cracking of hydrocarbons with the addition of water vapor is a mixture of hydrocarbons of different molecular weights and partial pressures.
  • This fission gas must be cooled very quickly from about 800 to 900 degrees C to 600 to 650 degrees C to stabilize its molecular composition.
  • the cracked gas is cooled by indirect heat transfer from the cracked gas to the evaporating water serving as the heat-absorbing medium. In order to maintain the high cooling rate, the cracked gas must flow through the heat exchanger tubes at high speed.
  • the further cooling of the cracked gas from 600 to 650 degrees C to 450 to 380 degrees C depending on the starting material is carried out for heat recovery and has only a minor influence on the quality of the cracked gas. This subsequent cooling can be carried out at lower flow rates.
  • the gas-side pressure in the tubes of the cracking gas furnace and the cracking gas cooler also has an influence on the quality of the cracked gas generated.
  • a low pressure drop in the cracked gas cooler leads to a lower pressure in the cracked gas furnace, which increases the yield of ethylene. In practice, therefore, an optimization between flow velocity and pressure loss in the flowing cracked gas is sought.
  • Shell and tube heat exchangers are used as cracked gas coolers, which cool the gas in one go from 800 degrees C to 400 degrees C. A correspondingly low flow rate is maintained in the heat exchanger tubes.
  • Such a heat exchanger is simple in construction, but the cooling rate, at least in the inlet part, could be too slow with regard to the stabilization of the desired fission gas composition.
  • Two-stage heat exchanger systems are also known, which are usually designed as single-tube coolers and which cool the cracked gas at a higher flow rate from 800 ° C to 500 ° C.
  • a separate heat exchanger is installed downstream of these coolers, in which the cracked gas is cooled to 400 degrees C at a lower flow rate.
  • Such a heat exchanger system increases the outlay on equipment considerably.
  • the invention has for its object to design the generic heat exchanger for cooling cracked gas in such a way that on the one hand the apparatus simplicity of a single-stage cooling is maintained and that on the other hand the advantages of a two-stage cooling with variable flow rates can be exploited.
  • the drawing shows schematically the longitudinal section through a heat exchanger.
  • the heat exchanger shown is connected to a cracked gas furnace and is used to cool the cracked gas generated.
  • the heat exchanger contains a bundle of heat exchanger tubes 1, of which only two are shown for reasons of clarity.
  • the heat exchanger tubes 1 are inserted at the ends in a tube sheet 2, 3.
  • the tube sheets 2, 3 are connected to a jacket 4, which encloses the bundle of heat exchanger tubes 1.
  • the jacket 4 is provided with a feed connector 5 and a discharge connector 6, via which a heat exchange medium is fed into the interior of the jacket 4 and is removed therefrom. Evaporating water serves as the heat exchange medium.
  • the heat exchanger tubes 1 connect a gas inlet chamber 7 to a gas outlet chamber 8, which are delimited by a hood 9 and in each case one of the tube plates 2, 3.
  • the cracked gas generated in the cracked gas furnace is fed to the gas inlet chamber 7.
  • Each heat exchanger tube 1 has two tube sections 10, 11 which are connected to one another by a cone 12.
  • the cone angle is preferably 6 to 8 degrees.
  • the diameter of the pipe section 10 facing the gas inlet chamber 7 is smaller than the diameter of the pipe section 11 on the gas outlet side.
  • the diameter of the pipe section 10 can for example be 31 or 38 mm and the diameter of the pipe section 11 can be 42 or 48 or 51 mm.
  • With a wall thickness of the heat exchanger tubes 1 of 3 or 5 mm the selected example results in an increase in the area of the clear tube cross section from 1 to 1.6 to 1.8. In general, the cross-sectional enlargement should be between 1 to 1.5 to 2.0.
EP90104494A 1989-04-26 1990-03-09 Echangeur pour le refroidissement de gaz de craquage Expired - Lifetime EP0396868B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913731 1989-04-26
DE3913731A DE3913731A1 (de) 1989-04-26 1989-04-26 Waermetauscher zum kuehlen von spaltgas

Publications (2)

Publication Number Publication Date
EP0396868A1 true EP0396868A1 (fr) 1990-11-14
EP0396868B1 EP0396868B1 (fr) 1992-12-23

Family

ID=6379493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104494A Expired - Lifetime EP0396868B1 (fr) 1989-04-26 1990-03-09 Echangeur pour le refroidissement de gaz de craquage

Country Status (5)

Country Link
US (1) US5031692A (fr)
EP (1) EP0396868B1 (fr)
JP (1) JPH031092A (fr)
DE (2) DE3913731A1 (fr)
ES (1) ES2038008T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2968388A1 (fr) * 2010-12-07 2012-06-08 Valeo Systemes Thermiques Echangeur de chaleur notamment pour vehicule automobile
EP2063207B1 (fr) * 2007-10-10 2014-02-19 Bomat Heiztechnik GmbH Installation de chaffage avec échangeur de chaleur

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5464057A (en) * 1994-05-24 1995-11-07 Albano; John V. Quench cooler
DK173540B1 (da) * 1994-06-29 2001-02-05 Topsoe Haldor As Spildvarmekedel
DE4431135C2 (de) * 1994-09-01 2003-02-13 Johann Himmelsbach Rohrbündelwärmetauscher für den Wärmetausch mit einem pulsierenden Strömungsmedium
EP1350560A1 (fr) * 2002-04-05 2003-10-08 Methanol Casale S.A. Echangeur de chaleur en plaques pour un réacteur avec lit catalytique
DE102006003317B4 (de) * 2006-01-23 2008-10-02 Alstom Technology Ltd. Rohrbündel-Wärmetauscher
DE102006055973A1 (de) * 2006-11-24 2008-05-29 Borsig Gmbh Wärmetauscher zur Kühlung von Spaltgas
WO2009004124A1 (fr) * 2007-07-05 2009-01-08 Ib.Ntec Dispositif de production de chaleur par circulation d'un fluide sous pression à travers une pluralité de tubulures, et système thermodynamique mettant en oeuvre un tel dispositif
US7802985B2 (en) * 2007-10-25 2010-09-28 Alan Cross Direct fired heater utilizing particulates as a heat transfer medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1501484A1 (de) * 1966-04-29 1969-10-23 Christian Carl Fa Durchlaufkuehler
DE1929474A1 (de) * 1969-02-27 1970-09-17 Stone & Webster Eng Corp Vorrichtung zum Waermeaustausch bzw. zum Kuehlen heisser,stroemender Substanz sowie Kuehlverfahren
EP0002687A1 (fr) * 1977-12-24 1979-07-11 Küppersbusch Aktiengesellschaft Echangeur de chaleur
DE3715713C1 (de) * 1987-05-12 1988-07-21 Borsig Gmbh Waermetauscher insbesondere zum Kuehlen von Spaltgasen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1948541A (en) * 1929-12-16 1934-02-27 Bbc Brown Boveri & Cie Heater system
US2740803A (en) * 1950-01-19 1956-04-03 Ruhrchemie Ag Catalytic hydrogenation of carbon monoxide with indirect heat exchange cooling
US4248834A (en) * 1979-05-07 1981-02-03 Idemitsu Petrochemical Co. Ltd. Apparatus for quenching pyrolysis gas
US4279734A (en) * 1979-12-21 1981-07-21 Shell Oil Company Quench Process
US4405440A (en) * 1982-11-22 1983-09-20 Shell Oil Company Process for maintaining the temperature of a steam-making effluent above the dew point

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1501484A1 (de) * 1966-04-29 1969-10-23 Christian Carl Fa Durchlaufkuehler
DE1929474A1 (de) * 1969-02-27 1970-09-17 Stone & Webster Eng Corp Vorrichtung zum Waermeaustausch bzw. zum Kuehlen heisser,stroemender Substanz sowie Kuehlverfahren
EP0002687A1 (fr) * 1977-12-24 1979-07-11 Küppersbusch Aktiengesellschaft Echangeur de chaleur
DE3715713C1 (de) * 1987-05-12 1988-07-21 Borsig Gmbh Waermetauscher insbesondere zum Kuehlen von Spaltgasen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2063207B1 (fr) * 2007-10-10 2014-02-19 Bomat Heiztechnik GmbH Installation de chaffage avec échangeur de chaleur
FR2968388A1 (fr) * 2010-12-07 2012-06-08 Valeo Systemes Thermiques Echangeur de chaleur notamment pour vehicule automobile
EP2463610A1 (fr) * 2010-12-07 2012-06-13 Valeo Systemes Thermiques Échangeur de chaleur notamment pour véhicule automobile

Also Published As

Publication number Publication date
DE3913731A1 (de) 1990-10-31
ES2038008T3 (es) 1993-07-01
DE59000631D1 (de) 1993-02-04
EP0396868B1 (fr) 1992-12-23
JPH031092A (ja) 1991-01-07
US5031692A (en) 1991-07-16

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