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EP1331465B1 - Wärmetauscher für Ethylenanlage - Google Patents

Wärmetauscher für Ethylenanlage Download PDF

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Publication number
EP1331465B1
EP1331465B1 EP02028251A EP02028251A EP1331465B1 EP 1331465 B1 EP1331465 B1 EP 1331465B1 EP 02028251 A EP02028251 A EP 02028251A EP 02028251 A EP02028251 A EP 02028251A EP 1331465 B1 EP1331465 B1 EP 1331465B1
Authority
EP
European Patent Office
Prior art keywords
plate
tube
tubes
nest
manifold
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
EP02028251A
Other languages
English (en)
French (fr)
Other versions
EP1331465A3 (de
EP1331465A2 (de
EP1331465B9 (de
Inventor
Adamo Gaetano Galatello
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.)
Alfa Laval Olmi SpA
Original Assignee
Alfa Laval Olmi SpA
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 Alfa Laval Olmi SpA filed Critical Alfa Laval Olmi SpA
Publication of EP1331465A2 publication Critical patent/EP1331465A2/de
Publication of EP1331465A3 publication Critical patent/EP1331465A3/de
Publication of EP1331465B1 publication Critical patent/EP1331465B1/de
Application granted granted Critical
Publication of EP1331465B9 publication Critical patent/EP1331465B9/de
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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0229—Double end plates; Single end plates with hollow spaces

Definitions

  • the present invention relates to a Transfer Line Exchanger (TLE) used for cooling gasses output from furnaces of ethylene production plant furnaces, a particular type of a tube nest heat exchanger with shell under pressure and input tube plate of the thin type.
  • TLE Transfer Line Exchanger
  • the sacrificial plate must however operate under particularly hostile conditions at for example input gas temperature to the exchanger capable of reaching 850-900°C and it is important that it not undergo abnormal deterioration since its unexpected loss of efficiency could compromise the underlying tube plate.
  • US 4,401,153 discloses a heat exchanger for effluent gases in ammonia production plants, wherein a nitriding-resistant cladding is applied to the tube plate to chemically protect the plate from corrosion caused by nitrogen and/or nitrogen compounds contained in the gas.
  • the general purpose of the present invention is to remedy the above mentioned shortcomings by making available an innovative tube plate structure in an exchanger which would allow unusual resistance and long duration of the tube plate avoiding the necessity of a sacrificial plate despite the thin tube plate.
  • FIG. 10 shows diagrammatically a partially cross sectioned view of a tube nest heat exchanger indicated as a whole by reference number 10. Only in the inlet zone is it completely visible since the rest of the exchanger is virtually prior art and therefore readily imaginable by those skilled in the art.
  • the exchanger 10 has a shell under pressure 11 with inlet tube plate 12 separating the interior of the shell from a manifold 13 for inlet of fluid to be cooled.
  • the tube plate 12 has passages 14 in it for communication with the interior of tubes 15 forming the tube nest.
  • the tube plate has on the manifold side a hardening layer 16 made up of a welding deposit of material harder than the plate and on the opposite side a projecting neck 17 around each passage 14 on which a corresponding tube 15 of the nest is welded at a distance from the internal surface of the plate.
  • the plate 12 is realized with a solid forged disk from which all the necks on which to weld the tubes are made by removal of material. Thus is obtained a very smooth surface.
  • the necks are sized in such a manner that the welding of the tube to the neck is located at a distance from the plate which is approximately equal to at least the thickness of the plate.
  • the tubes are welded to the necks by the system known as 'internal bore welding'.
  • the weld deposit 16 covering all the surface to be protected is created with material compatible with the tube plate and with the characteristics of high resistance to the impact of the coke particles and a thermal expansion such as to have acceptable stress between the two different layers of material.
  • the plate is made of steel lightly alloyed with molybdenum or chromo-molybdenum while the deposit is realized of nickel-chrome alloy (Alloy 625).
  • the deposit is used here as an anti-erosion layer.
  • the temperature of the plate is kept low by the cooling fluid inside the exchanger.
  • the welds of the tubes to the plate are not exposed to impact with the gases and are kept cool because they are immersed in water at a certain distance from the plate.
  • the completely smooth plate surface does not retain the deposits and, even with very dirty water and therefore with considerable deposits the welds are free from corrosion because they are in a zone far from the plate and not covered by the deposits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Claims (1)

  1. Wärmetauscher (TLE) für den Auslass von Kühlgasen aus Öfen von Anlagen für die Ethylenherstellung, in denen Hochdruckwasserdampf außerhalb von Rohren (15) erzeugt wird, mit einem unter Druck stehenden Behälter (11) und einer Einlassrohrplatte (12), die das Innere des Behälters (11) von einem Einlasssammelrohr (13) der zu kühlenden Flüssigkeit trennt, wobei die Rohrplatte (12) auf der Sammelrohrseite eine Erosionsschutzbeschichtung (16) besitzt und die Rohrplatte (12) Durchgänge (14) für die Verbindung mit dem Inneren der Rohre (15) des Rohrbündels und um jeden Durchgang (14) herum besitzt, wobei auf der in Bezug auf das Sammelrohr gegenüberliegenden Seite der Rohrplatte (12) ein auskragender Hals (17) vorhanden ist, auf dem ein entsprechendes Rohr (15) des Bündels angeschweißt ist, dadurch gekennzeichnet, dass die Platte (12) aus einem leicht mit Molybdän oder Chrom-Molybdän legierten Stahl hergestellt ist und die Erosionsschutzbeschichtung (16) aus einem Schweißgut aus Nickel-Chrom-Legierung 625 besteht, die härter als die Platte (12) ist, und die Rohre (15) mittels "internem Bohrschweißen" in einem Abstand von der Plattenoberfläche an die jeweiligen Hälse (17) angeschweißt sind, der ungefähr mindestens der Dicke der Platte entspricht.
EP02028251A 2002-01-24 2002-12-16 Wärmetauscher für Ethylenanlage Expired - Lifetime EP1331465B9 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002MI000118A ITMI20020118A1 (it) 2002-01-24 2002-01-24 Scambiatore di calore con piastra tubiera sottile con struttura perfezionata
ITMI20020118 2002-01-24

Publications (4)

Publication Number Publication Date
EP1331465A2 EP1331465A2 (de) 2003-07-30
EP1331465A3 EP1331465A3 (de) 2006-07-05
EP1331465B1 true EP1331465B1 (de) 2012-02-01
EP1331465B9 EP1331465B9 (de) 2012-08-01

Family

ID=11448969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02028251A Expired - Lifetime EP1331465B9 (de) 2002-01-24 2002-12-16 Wärmetauscher für Ethylenanlage

Country Status (3)

Country Link
EP (1) EP1331465B9 (de)
AT (1) ATE544045T1 (de)
IT (1) ITMI20020118A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3392326A1 (de) 2017-04-19 2018-10-24 Linde Aktiengesellschaft Verfahren und anlage zur herstellung eines olefins
US11143465B2 (en) 2017-03-14 2021-10-12 Alfa Laval Olmi S.P.A Protection device for a shell-and-tube equipment
US12523435B2 (en) 2020-09-04 2026-01-13 Alfa Laval Olmi S.P.A. Device and method for restoring the tube-to-tube sheet weld joints in a shell-and-tube equipment

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20150270A1 (it) * 2015-04-24 2016-10-24 Hexsol Italy Srl Scambiatore di calore a fascio tubiero con saldature IBW
EP3476470B1 (de) * 2017-10-26 2022-11-09 ALFA LAVAL OLMI S.p.A. Rohrbündelausrüstung mit verteilungsvorrichtung
IT201800004154A1 (it) * 2018-03-30 2019-09-30 Galatello Adamo Gaetano Scambiatore di calore a fascio tubiero tle privo di setti o diaframmi forati di supporto
EP4134614A1 (de) 2021-08-11 2023-02-15 Basell Polyolefine GmbH Transferleitungswärmetauscher mit thermischer sprühbeschichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114415A (en) * 1957-02-15 1963-12-17 Allied Chem Shell and tube heat exchangers
US3367414A (en) * 1960-11-25 1968-02-06 Westinghouse Electric Corp Welded assembly
DE3022480A1 (de) * 1980-06-14 1982-01-07 Uhde Gmbh, 4600 Dortmund Vorrichtung zum waermetausch zwischen einen nh (pfeil abwaerts)3(pfeil abwaerts) -konverter verlassendem kreislaufgas und wasser
JPH0730213Y2 (ja) * 1988-11-17 1995-07-12 川崎重工業株式会社 熱交換器
JP2918099B2 (ja) * 1996-03-22 1999-07-12 川崎重工業株式会社 スチレンモノマー製造用の熱交換器
ITMI990549U1 (it) * 1999-09-08 2001-03-08 Olmi Spa Scambiatore di calore a fascio tubiero con piastra di sacrificio perfezionata
IT246964Y1 (it) * 1999-12-23 2002-04-10 Olmi Spa Scambiatore di calore a fascio tubiero con accessi per la pulizia

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11143465B2 (en) 2017-03-14 2021-10-12 Alfa Laval Olmi S.P.A Protection device for a shell-and-tube equipment
EP3392326A1 (de) 2017-04-19 2018-10-24 Linde Aktiengesellschaft Verfahren und anlage zur herstellung eines olefins
WO2018192999A1 (de) 2017-04-19 2018-10-25 Linde Aktiengesellschaft Verfahren und anlage zur herstellung eines olefins
US12523435B2 (en) 2020-09-04 2026-01-13 Alfa Laval Olmi S.P.A. Device and method for restoring the tube-to-tube sheet weld joints in a shell-and-tube equipment

Also Published As

Publication number Publication date
ITMI20020118A0 (it) 2002-01-24
EP1331465A3 (de) 2006-07-05
EP1331465A2 (de) 2003-07-30
ITMI20020118A1 (it) 2003-07-24
ATE544045T1 (de) 2012-02-15
EP1331465B9 (de) 2012-08-01

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