EP0418534A2 - Echangeur de chaleur pour refroidir un gaz de réaction - Google Patents

Echangeur de chaleur pour refroidir un gaz de réaction Download PDF

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Publication number
EP0418534A2
EP0418534A2 EP90115139A EP90115139A EP0418534A2 EP 0418534 A2 EP0418534 A2 EP 0418534A2 EP 90115139 A EP90115139 A EP 90115139A EP 90115139 A EP90115139 A EP 90115139A EP 0418534 A2 EP0418534 A2 EP 0418534A2
Authority
EP
European Patent Office
Prior art keywords
tube
heat exchanger
cooling
tubes
gas
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Withdrawn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
EP90115139A
Other languages
German (de)
English (en)
Other versions
EP0418534A3 (en
Inventor
Peter Brücher
Wolfgang Kehrer
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 EP0418534A2 publication Critical patent/EP0418534A2/fr
Publication of EP0418534A3 publication Critical patent/EP0418534A3/de
Withdrawn legal-status Critical Current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
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F28D7/0075—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the same heat exchange medium flowing through sections having different heat exchange capacities or for heating or cooling the same heat exchange medium at different temperatures
    • 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
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F28D7/163—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 with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1669—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 with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • F28D7/1676—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 with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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 reaction gas produced in a tube furnace with the features of the preamble of patent claim 1.
  • Such heat exchangers are used for the rapid cooling of reaction gases from cracking furnaces and industrial plant reactors with simultaneous generation of high-pressure steam as a heat-dissipating medium.
  • the hot reaction gas emerging from the tube furnace must be cooled in the shortest possible time to an intermediate temperature at which the chemical reactions taking place in the reaction gas come to a standstill.
  • the further cooling of the reaction gas to the desired final temperature can then take place more slowly and taking into account other criteria, for example economic or process engineering.
  • a low total pressure drop on the gas side is of great importance for the gap yield.
  • a short overall length is also desirable for economic reasons.
  • GB-PS 10 87 512 It is known (GB-PS 10 87 512) to cool the cracked gas in a single cooled tube, which is connected directly to the furnace outlet, to the final temperature. This ensures rapid gas cooling, but a high pressure loss must be accepted. From GB-PS 10 87 512 it is also known to carry out the cooling in two stages, the first stage in turn consisting of a single, cooled pipe connected to the furnace outlet, which cools the gas to the required intermediate temperature in a very short time. The cracked gas is then passed through connecting pipes into a second separate apparatus, in which the remaining cooling is carried out. The construction effort by two separate devices is very large. Furthermore, the apparatus connection creates a high pressure loss, which has a disadvantageous effect on the splitting yield.
  • the invention has for its object to reduce the construction costs of a generic heat exchanger while maintaining favorable process and cooling conditions.
  • the first and the second cooling stage are enclosed by a common jacket which serves to hold the cooling medium. Both cooling stages are thus combined in a single unit, so that the construction costs are reduced.
  • the rapid cooling of the reaction gas in the first cooling stage to the intermediate temperature begins immediately behind the furnace outlet without reducing the speed.
  • Final cooling in the directly integrated second cooling stage takes place at a lower mass speed and thus with less pressure loss.
  • the second cooling stage can be made significantly shorter than a single pipe.
  • the distribution chamber between the first and the second cooling stage can also be cooled and thus contribute to heat transfer. The conical design of the distribution chamber results in a pressure recovery and thus a reduced total pressure loss.
  • the heat exchangers shown serve for the rapid cooling of cracked gas or another reaction gas which is produced in a cracked furnace or chemical plant reactor designed as a tube furnace.
  • the tube furnace which is not shown, consists of individual heated tubes through which the cracked gas to be generated flows.
  • the heat exchanger contains two cooling stages, of which the first is a single tube heat exchanger with a single tube 1 and the second is a bundle tube heat exchanger with tubes 2.
  • the single tube 1 is surrounded by an outer tube 3 and is tightly connected to it on the gas inlet side by means of an annular flange 4.
  • the single tube 1 is connected directly to a tube of the tube furnace via a connection largely free of thermal stresses.
  • the internal dimensions of the tube largely correspond to those of the individual tube 1.
  • the gas outlet end of the single tube 1 opens into a distribution chamber 5 which is delimited by a tube plate 6.
  • the tubes 2 of the tube bundle are welded gas-tight with their gas inlet ends into the tube plate 6.
  • a second tube plate 7 receives the gas outlet ends of the tubes 2 in a gas-tight manner.
  • a gas outlet chamber 8 connects to the tube plate 7 for removing the cooled cracked gas.
  • An outer jacket 9 encloses an interior space 10 and surrounds the tubes 2.
  • the distribution chamber 5 widens conically in the flow direction of the cracked gas, starting from the cross section of the single tube 1.
  • the diameter of the tube plate 6 delimiting the distribution chamber 5 is smaller than the inner diameter of the outer jacket 9.
  • the outer tube 3 is connected to the outer jacket 9 via a conical intermediate piece 11.
  • the annular space 12 between the individual tube 1 and the outer tube 3 is connected to the inner space 10 enclosed by the outer jacket 9, so that a coolant can flow through both spaces 10, 12 continuously.
  • the distribution chamber 5 is thus also within the cooling medium flow and can also be used to cool the cracked gas.
  • Water under high pressure is used as the cooling medium and is fed to the heat exchanger via one or more inlet connections 13.
  • the water evaporates by absorbing heat from the cracked gas flowing through the single pipe 1, the distribution chamber 5 and the pipes 2 and emerges as a water-steam mixture through one or more outlet connections 14.
  • the inlet connector 13 is attached to the outer tube 3 and the outlet connector 14 is attached to the outer jacket 9.
  • the individual tube 1 is passed through the outer jacket 9 parallel to the tubes 2 and is preferably arranged in the longitudinal axis of the outer jacket 9.
  • the distribution chamber 5 is delimited by the tube plate 6 and a hood 15, both of which are attached to the outer jacket 9 at one end.
  • the tube plate 7 inserted in the outer jacket 9 and connected to the gas outlet is connected to the outer tube 3, which in this embodiment only surrounds the single tube 1 over a partial length.
  • the outer tube 3 is surrounded by an annular gas collection chamber 16, which is provided with a gas outlet connection 17 and is delimited in relation to the interior 10 by the tube plate 7.
  • the heat exchanger In contrast to the heat exchanger according to FIG. 1, in which the cracked gas to be cooled flows through the single tube 1 and the tubes 2 without changing the direction of flow, the heat exchanger has 2 flows through the single tube 1 and the tubes 2 on the gas side in the opposite direction. 2 are the annular space 12 and the interior 10 in connection and are flowed through by the same cooling medium. In turn, the inlet connector 13 for the cooling medium is attached to the outer tube 3 and the outlet connector 14 to the outer jacket 9.
  • the cracked gas generated in the tube furnace flows for cooling in the individual tube 1 of the individual tube heat exchanger representing the first cooling stage without a change in volume and without a delay due to a change in volume or speed.
  • the cracked gas releases its heat immediately behind the exit of the tube furnace to the cooling medium located in the annular space 12 around the individual tube 1.
  • the cracked gas can thus be cooled to the required intermediate temperature at high mass speed and therefore in the shortest possible time.
  • the cracked gas enters the distribution chamber 5 directly from the single pipe 1, which, in the case of a conical configuration, enables pressure recovery and thus brings about a reduction in the total pressure loss.
  • the cracked gas flows through these tubes 2 with a lower mass velocity and thus with a desired lower pressure loss. It gives off its heat to the surrounding cooling medium within the interior 10 and is cooled to the final temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP19900115139 1989-09-22 1990-08-07 Heat exchanger for cooling a reaction gas Withdrawn EP0418534A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3931685 1989-09-22
DE19893931685 DE3931685A1 (de) 1989-09-22 1989-09-22 Waermetauscher zum kuehlen von reaktionsgas

Publications (2)

Publication Number Publication Date
EP0418534A2 true EP0418534A2 (fr) 1991-03-27
EP0418534A3 EP0418534A3 (en) 1991-10-23

Family

ID=6389997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900115139 Withdrawn EP0418534A3 (en) 1989-09-22 1990-08-07 Heat exchanger for cooling a reaction gas

Country Status (4)

Country Link
EP (1) EP0418534A3 (fr)
JP (1) JPH03113291A (fr)
CA (1) CA2025756A1 (fr)
DE (1) DE3931685A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2134736A1 (es) * 1997-08-11 1999-10-01 Milla Carlos Santaolalla Sistema de refrigeracion para liquidos.
WO2007039199A1 (fr) * 2005-09-30 2007-04-12 Eni S.P.A. Échangeur de chaleur
EP2282140A1 (fr) * 2008-04-08 2011-02-09 Sanden Corporation Échangeur de chaleur et dispositif de production d eau chaude l utilisant
CN103256835A (zh) * 2013-05-17 2013-08-21 广西壮族自治区特种设备监督检验院 一种可方便壳程清洗的管壳式换热器
DE102012017405A1 (de) * 2012-09-03 2014-03-06 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Interner Wärmetauscher für eine Kraftfahrzeug-Klimaanlage
EP2814144A1 (fr) * 2013-06-10 2014-12-17 ABB Technology AG Échangeur de chaleur air-air
CN111964489A (zh) * 2020-08-17 2020-11-20 肖美占 一种提高不同换热管之间横截面积差异化的高效换热器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5910663B2 (ja) * 2010-04-09 2016-04-27 株式会社デンソー 排気熱交換装置
JP5904108B2 (ja) * 2011-12-19 2016-04-13 株式会社デンソー 排気熱交換装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015021B (de) * 1954-02-19 1957-09-05 Atlas Werke Ag Waermeaustauscher
DE2037382A1 (en) * 1970-07-23 1972-02-03 Bbc Sulzer Turbomaschinen Double walled heat exchanger - with continuous cooling flow through wall space at hot end

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429402A1 (fr) * 1978-06-22 1980-01-18 Commissariat Energie Atomique Echangeur intermediaire pour reacteur nucleaire a neutrons rapides
US4263260A (en) * 1978-07-10 1981-04-21 Linde Aktiengesellschaft High pressure and high temperature heat exchanger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015021B (de) * 1954-02-19 1957-09-05 Atlas Werke Ag Waermeaustauscher
DE2037382A1 (en) * 1970-07-23 1972-02-03 Bbc Sulzer Turbomaschinen Double walled heat exchanger - with continuous cooling flow through wall space at hot end

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2134736A1 (es) * 1997-08-11 1999-10-01 Milla Carlos Santaolalla Sistema de refrigeracion para liquidos.
WO2007039199A1 (fr) * 2005-09-30 2007-04-12 Eni S.P.A. Échangeur de chaleur
EA011836B1 (ru) * 2005-09-30 2009-06-30 Эни С.П.А. Теплообменник
CN101278165B (zh) * 2005-09-30 2010-05-19 艾尼股份公司 换热器
EP2282140A4 (fr) * 2008-04-08 2014-01-01 Sanden Corp Échangeur de chaleur et dispositif de production d eau chaude l utilisant
EP2282140A1 (fr) * 2008-04-08 2011-02-09 Sanden Corporation Échangeur de chaleur et dispositif de production d eau chaude l utilisant
DE102012017405A1 (de) * 2012-09-03 2014-03-06 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) Interner Wärmetauscher für eine Kraftfahrzeug-Klimaanlage
CN103256835A (zh) * 2013-05-17 2013-08-21 广西壮族自治区特种设备监督检验院 一种可方便壳程清洗的管壳式换热器
CN103256835B (zh) * 2013-05-17 2015-07-29 广西壮族自治区特种设备监督检验院 一种可方便壳程清洗的管壳式换热器
EP2814144A1 (fr) * 2013-06-10 2014-12-17 ABB Technology AG Échangeur de chaleur air-air
WO2014198655A2 (fr) * 2013-06-10 2014-12-18 Abb Technology Ag Échangeur de chaleur air-air
WO2014198655A3 (fr) * 2013-06-10 2015-04-09 Abb Technology Ag Échangeur de chaleur air-air
CN111964489A (zh) * 2020-08-17 2020-11-20 肖美占 一种提高不同换热管之间横截面积差异化的高效换热器
CN111964489B (zh) * 2020-08-17 2021-10-22 博瑞特热能设备股份有限公司 一种提高不同换热管之间横截面积差异化的高效换热器

Also Published As

Publication number Publication date
JPH03113291A (ja) 1991-05-14
EP0418534A3 (en) 1991-10-23
DE3931685A1 (de) 1991-04-04
CA2025756A1 (fr) 1991-03-23

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