EP0718579A2 - Echangeur de chaleur pour refroidissement de gaz de craquage - Google Patents

Echangeur de chaleur pour refroidissement de gaz de craquage Download PDF

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Publication number
EP0718579A2
EP0718579A2 EP95111740A EP95111740A EP0718579A2 EP 0718579 A2 EP0718579 A2 EP 0718579A2 EP 95111740 A EP95111740 A EP 95111740A EP 95111740 A EP95111740 A EP 95111740A EP 0718579 A2 EP0718579 A2 EP 0718579A2
Authority
EP
European Patent Office
Prior art keywords
cooling
tube
heat exchanger
recess
tubes
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
EP95111740A
Other languages
German (de)
English (en)
Other versions
EP0718579B1 (fr
EP0718579A3 (fr
Inventor
Peter Brücher
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.)
Borsig GmbH
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 EP0718579A2 publication Critical patent/EP0718579A2/fr
Publication of EP0718579A3 publication Critical patent/EP0718579A3/fr
Application granted granted Critical
Publication of EP0718579B1 publication Critical patent/EP0718579B1/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
    • 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
    • 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
    • C10G9/002—Cooling of cracked gases
    • 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
    • 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
    • F28D7/10—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 one within the other, e.g. concentrically
    • F28D7/106—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 one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • 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
    • 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

Definitions

  • the invention relates to a heat exchanger for cooling cracked gas with the features of the preamble of patent claim 1.
  • the cracked gas is generated by thermal cracking of hydrocarbons in a cracking furnace. These cracking furnaces are provided with a number of cracked tubes heated from the outside, through which the hydrocarbons used are passed with the addition of water vapor.
  • the cracked gas generated leaves the cracked tubes at a temperature of about 800 to 850 ° C and must be cooled very quickly to stabilize its molecular composition. This takes place in cracked gas coolers by heat transfer from the cracked gas to evaporating water under high pressure.
  • Cracked gas coolers are known in which each individual cracked tube emerging from the cracking furnace is connected to a separate cracked gas cooler, which can have one or more tubes which are enclosed by a common jacket or are designed as double tubes. Since the canned tubes emerging from the cracking furnace are generally arranged linearly at a relatively short distance from one another, all cracked gas coolers can be combined in one module in the form of a linear cooler.
  • the cooling medium is fed in and out at the ends of the pipes by means of water chambers, which can be oval or tubular. The interior of the water chambers is connected to all connected pipes.
  • the invention has for its object to design the water chamber of the generic heat exchanger so that no material overheating of the surfaces involved in the heat exchange occur that a defined flow of the entering cooling medium is set and that the water chamber withstands the high pressures of the cooling medium and is inexpensive to manufacture.
  • the pressure of the cooling medium acts on a relatively narrow annular surface which represents the bottom of the depression and whose outer diameter does not substantially exceed the inner diameter of the outer tube. Due to the small size of the floor, which is loaded by the pressure of the cooling medium, it only needs to be provided with a small wall thickness. This small wall thickness allows good cooling of the temperature-loaded floor by the cooling medium, so that material overheating can be avoided. Outside the wells, which are spaced apart from one another, the water chamber retains the original thickness of the solid piece, so that the water chamber itself is stiff enough to withstand the high pressure of the cooling medium without additional reinforcements.
  • the recesses can be made in the solid piece by simple mechanical processing, such as drilling and milling, which reduces the effort for the production of the water chamber. Since each cooling tube has its own recess, which is separate from the other cooling tubes, each cooling tube can be controlled individually by the cooling medium, which results in a better distribution of the cooling medium to this one cooling tube.
  • the recess which is circular in cross section, in particular in connection with a tangential supply of the cooling medium, produces a rotating cooling medium flow which ensures good cooling of the floor and an undesired deposition of particles from the Coolant does not allow. Any existing particles are kept in the rotating flow in the vicinity of the wall of the depression according to the cyclone principle and can be removed during operation through the further bore leading outwards.
  • a cracking gas is generated in a cracking furnace by reacting hydrocarbons with water vapor.
  • the cracking furnace is provided with cracking tubes 2 which are heated from the outside and through which the feedstock flows.
  • the cracked gas leaving the cracked tubes 2 at a temperature of 800 to 850 ° C. directly enters a cracked gas cooler 3 which is arranged in the immediate vicinity above the cracking furnace.
  • this cracked gas cooler 3 the molecular composition of the cracked gas is stabilized by a rugged cooling in the heat exchange with evaporating water under high pressure.
  • the cracked gas cooler 3 consists of one or more cooling tubes 4, which are arranged in a row next to one another in such a way that each cooling tube 4 is assigned to a cracking tube 2 and extends axially.
  • the inner diameter of the can 2 and the cooling tube 4 are, as shown, usually the same size.
  • the cooling tubes 4 open into a gas manifold 5.
  • Each cooling tube 4 is surrounded by an outer tube 6 to form an annular space. At both ends of the outer tubes 6, water chambers 7, 8 are provided for the supply and discharge of the cooling medium.
  • each can 2 is widened in a fork shape.
  • an inner tube section 9, which forms the extension of the can 2 and an outer tube section 10 are formed, both of which are connected to one another at one end.
  • the outer tube section 10 is welded to the lower water chamber 7.
  • the inner tube section 9 of the canned tube 2 faces the cooling tube 4 at a small axial distance.
  • the space between the inner pipe section 9 and the outer pipe section 10 is filled with a layer 17 made of a heat-insulating material.
  • the water chamber 7, 8 is made from a solid, seamless, strip-shaped piece. In this piece circular recesses 11 are machined at a distance from one another, the number of which corresponds to that of the cooling tubes 4. Each cooling tube 4 is assigned its own depression 11.
  • the outer tube 6 is welded to the water chamber 7 on the side facing away from the can 2.
  • the inside diameter of the outer tube 6 corresponds to the diameter of the reinforcement 11 at the weld point.
  • the depression 11 can have this diameter throughout.
  • the depression can also be widened in the central region, the diameter of the depression 11 being greater than the inner diameter of the outer tube 6 by approximately the width of the space between the cooling tube 4 and the outer tube 6.
  • the recess 11 is worked so deeply into the piece forming the water chamber 7, 8 that an annular bottom 12 with a small remaining wall thickness remains.
  • the cooling tube 4 is welded into this base 12.
  • the area of the annular bottom 12 is limited by the outer diameter of the cooling tube 4 and the diameter of the depression 11.
  • a bore 13 preferably opens tangentially into the recess 12 at the level of the base 12.
  • the holes 13 are each connected via a connecting piece 14 to a supply line 15 for the cooling medium.
  • the cooling medium enters the depression 11 at high speed through the bore 13 and generates a rotating flow around the cooling tube 4. This flow ensures good cooling of the bottom 12 of the depression 11 and thereby prevents particles from being deposited on the bottom 12, which would lead to harmful local overheating.
  • the recess 11 is provided with a further bore 16 which is guided outwards at the level of the base 12. Through this further bore 16, the particles which are located in the depression 11 and rotate with the flow of the cooling medium can be discharged during the operation of the cracked gas cooler 3.
  • the further bores 16 are connected to a line 18.
  • This line 18 is provided with a drain valve, not shown. By briefly opening the drain valve suddenly, cooling medium with particles contained therein can be removed.
  • the water which serves as the cooling medium and is under high pressure and fed via the feed line 15 into the recesses 11 of the lower water chamber 7, flows through the intermediate space between the cooling tube 4 and the outer tube 6 enters the upper water chamber 8 as a water / saturated steam mixture. From this, the water / saturated steam mixture is fed to a water-steam cycle, not shown, to which the feed line 15 is also connected.
  • the holes 13, 16 described can be used as inspection openings by through them during an endoscope an endoscope is inserted into the recess 11. With the help of these endoscopes, the state of the recess 11 can be checked.
  • the cracked gas cooler can also contain more than three or only a single cooling tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP95111740A 1994-12-21 1995-07-26 Echangeur de chaleur pour refroidissement de gaz de craquage Expired - Lifetime EP0718579B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4445687 1994-12-21
DE4445687A DE4445687A1 (de) 1994-12-21 1994-12-21 Wärmetauscher zum Kühlen von Spaltgas

Publications (3)

Publication Number Publication Date
EP0718579A2 true EP0718579A2 (fr) 1996-06-26
EP0718579A3 EP0718579A3 (fr) 1997-10-08
EP0718579B1 EP0718579B1 (fr) 1999-11-10

Family

ID=6536519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111740A Expired - Lifetime EP0718579B1 (fr) 1994-12-21 1995-07-26 Echangeur de chaleur pour refroidissement de gaz de craquage

Country Status (4)

Country Link
US (1) US5579831A (fr)
EP (1) EP0718579B1 (fr)
JP (1) JP3605681B2 (fr)
DE (2) DE4445687A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975527A (zh) * 2010-10-21 2011-02-16 中国石油化工股份有限公司 一种线性急冷换热器入口连接件及其急冷换热器

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19622139A1 (de) * 1994-12-21 1997-12-04 Borsig Babcock Ag Wärmetauscher zum Kühlen von Spaltgas
US5813453A (en) * 1996-06-01 1998-09-29 Deutsche Babcock-Borsig Ag Heat exchanger for cooling cracked gas
US5690168A (en) * 1996-11-04 1997-11-25 The M. W. Kellogg Company Quench exchanger
CA2289852C (fr) * 1997-05-13 2007-07-03 Stone & Webster Engineering Corporation Fourneau de craquage comportant des tubes de chauffage par rayonnement
DE19833004A1 (de) * 1998-07-22 2000-01-27 Borsig Gmbh Wärmetauscher zum Kühlen eines heißen Prozeßgases
CA2274724A1 (fr) * 1999-06-16 2000-12-16 Andre Landry Echangeur de chaleur a vapeur protege contre le gel
US20040089439A1 (en) * 2002-11-07 2004-05-13 Treverton Andrew Clare Tube-to-tube heat exchanger assembly
ITMI20040272A1 (it) * 2004-02-18 2004-05-18 Olmi Spa Giunzione tra un tubo raffreddato a doppia parete ed un tubo non raffreddato e scambiatore di calore a doppio tubi comprendente tale giunzione
ITMI20050847A1 (it) * 2005-05-11 2006-11-12 Olmi Spa Giunzione tra tubo raffreddato e tubo non raffreddato in uno scambiatore di calore a doppio tubo
US7780843B2 (en) 2005-07-08 2010-08-24 ExxonMobil Chemical Company Patents Inc. Method for processing hydrocarbon pyrolysis effluent
US7465388B2 (en) * 2005-07-08 2008-12-16 Exxonmobil Chemical Patents Inc. Method for processing hydrocarbon pyrolysis effluent
US7763162B2 (en) 2005-07-08 2010-07-27 Exxonmobil Chemical Patents Inc. Method for processing hydrocarbon pyrolysis effluent
US8524070B2 (en) * 2005-07-08 2013-09-03 Exxonmobil Chemical Patents Inc. Method for processing hydrocarbon pyrolysis effluent
US7749372B2 (en) * 2005-07-08 2010-07-06 Exxonmobil Chemical Patents Inc. Method for processing hydrocarbon pyrolysis effluent
DE102008036955A1 (de) 2008-08-08 2010-02-11 Borsig Gmbh Verbindungsstück zwischen einem Spaltrohr und einem Kühlrohr sowie ein Verfahren zum Verbinden eines Spaltrohres mit einem Kühlrohr
DE102009025624A1 (de) * 2009-06-17 2010-12-23 Borsig Gmbh Wärmetauscher zum Kühlen von Spaltgas
DE102014018261A1 (de) * 2014-12-11 2016-06-16 Borsig Gmbh Quenchkühlsystem
ES2728556T3 (es) * 2016-07-08 2019-10-25 Technip France Intercambiador de calor para enfriar el gas de reacción
RU2757041C1 (ru) * 2017-10-27 2021-10-11 Чайна Петролеум Энд Кемикал Корпорейшн Интенсифицирующая теплопередачу труба, а также содержащие ее крекинговая печь и атмосферно-вакуумная нагревательная печь
IT201800004827A1 (it) * 2018-04-24 2019-10-24 Scambiatore di calore a doppio tubo e relativo metodo di fabbricazione
DE102021003955A1 (de) * 2021-07-23 2023-01-26 Borsig Gmbh Wärmetauscher

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DE3533219C1 (de) * 1985-09-18 1986-11-13 Borsig Gmbh, 1000 Berlin Rohrbuendelwaermetauscher
FR2599133B1 (fr) * 1986-05-21 1990-09-21 Struthers Wells Sa Echangeur de chaleur tubulaire a double plaque de support du faisceau de tube
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DE3822808C2 (de) * 1988-07-06 1993-12-23 Balcke Duerr Ag Wärmetauscher mit zwischen zwei Rohrplatten angeordneten Wärmetauscherrohren
DE3930205A1 (de) * 1989-09-09 1991-03-14 Borsig Babcock Ag Rohrbuendel-waermetauscher
DE4000527A1 (de) * 1990-01-10 1991-07-11 Borsig Babcock Ag Waermetauscher zum kuehlen von heissem reaktionsgas
DE4230092C2 (de) * 1992-09-09 2000-07-27 Behr Gmbh & Co Wärmetauscher, insbesondere Verdampfer für Klimaanlagen von Kraftfahrzeugen
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None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975527A (zh) * 2010-10-21 2011-02-16 中国石油化工股份有限公司 一种线性急冷换热器入口连接件及其急冷换热器
CN101975527B (zh) * 2010-10-21 2012-07-25 中国石油化工股份有限公司 一种线性急冷换热器入口连接件及其急冷换热器

Also Published As

Publication number Publication date
DE4445687A1 (de) 1996-06-27
EP0718579B1 (fr) 1999-11-10
US5579831A (en) 1996-12-03
DE59507221D1 (de) 1999-12-16
JP3605681B2 (ja) 2004-12-22
EP0718579A3 (fr) 1997-10-08
JPH0979789A (ja) 1997-03-28

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