WO2013158399A1 - Supports à modération de température pour tubes d'écoulement - Google Patents

Supports à modération de température pour tubes d'écoulement Download PDF

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Publication number
WO2013158399A1
WO2013158399A1 PCT/US2013/035653 US2013035653W WO2013158399A1 WO 2013158399 A1 WO2013158399 A1 WO 2013158399A1 US 2013035653 W US2013035653 W US 2013035653W WO 2013158399 A1 WO2013158399 A1 WO 2013158399A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
tube
support
header
coupled
Prior art date
Application number
PCT/US2013/035653
Other languages
English (en)
Inventor
Srikantiah N. PARAMESWAR
Original Assignee
Technip France
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 Technip France filed Critical Technip France
Publication of WO2013158399A1 publication Critical patent/WO2013158399A1/fr

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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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies

Definitions

  • the invention disclosed and taught herein relates generally to temperature controlled supports for flow tubes; and more specifically relates to a system and method of controlling the temperature of supports for flow tubes in environments such as a furnace.
  • Conduits and tubes in which fluid can flow are typically used to transfer heat between a surrounding environment and the fluid inside the flow tubes by transferring energy from a higher temperature to a lower temperature either from the environment to the flow tubes, such as in a furnace, or from the tubes to the environment, such as a heater.
  • the same principles of heating apply with cooling by transferring energy from a lower temperature to a higher temperature and both transfers of energy will generally be referred to herein as "heat transfer.”
  • the flow tubes are generally in the shape of coils to maximize heat transfer in the environment.
  • Two general types of coils are serpentine and helical.
  • a serpentine coil is made of a flow tube that bends each successive pass of the flow tube in an opposite direction from the preceding pass in an aligned row.
  • a helical coil progressively winds a flow tube in a spiral that is generally circular.
  • Coils can be oriented horizontally or vertically, and helical coils typically are supported by a set of structural supports running parallel to the axis of the helix.
  • a vertical coil can be supported by supports suspended from a top of a furnace or other structure, or resting on the floor of the structure.
  • a typical arrangement is a set of three or four pipes suspended from the top of the furnace. While the metal temperature of the coiled flow tube remains relatively low due to the internal fluid flow, the supports attain very high temperatures at about the same as the furnace temperatures that are typically in the range of 1600 F (870 C) to 2000 F (1090 C) or more. Hence, the supports are required to be made of high alloy materials to withstand such temperatures for a commercially reasonable lifetime.
  • Brackets or ledges are welded to the supports typically for each turn of the coil at three or four support locations around the coil periphery.
  • the coil can be held down by U-bolts or other fasteners at these support locations.
  • Figure 1 is a cross-sectional side schematic view of a typical support system 2 with brackets for supporting a coil within a differential temperature environment, such as a furnace.
  • a chamber 4 encloses the various tubes used to flow the process fluid.
  • a flow tube 6 having helical coils 8 has an inlet 10 that protrudes through the bottom 18 and an outlet that protrudes through the top 14.
  • Longitudinal supports 16A, 16B (generally, "16") are coupled to the top 14 for suspending therefrom. The supports 16 are coupled to the coils 8 of the flow tube 6 with brackets 20.
  • the longitudinal supports thermally expand more longitudinally than the coil, because the longitudinal supports attain higher temperatures and because the supports are made of high alloy materials that typically have higher coefficients of expansion than the coil. Also, the coil typically thermally expands radially more than the supports and can cause radial stress.
  • the connected external piping is typically designed to be flexible to accommodate this coil expansion. The differential expansion causes multiple stresses between the coil and the supports. Without special design allowances and flexibility, the differential expansion can cause failure of the supports, the coil, or both.
  • the present invention provides a system and method that allows use of the same or similar material as the flow tubes for the supports and without requiring more expensive stainless or higher alloy supports.
  • the disclosure provides one or more temperature moderated support tubes that allow the process fluid in the flow tubes to also pass through the support tubes.
  • the benefit is that the process fluid moderates the temperature of the support tubes and hence the thermal expansion of the support tubes to be relatively consistent with the expansion of the flow tubes of the coil, and further benefits from additional heat transfer area using the support tubes.
  • the support tubes can be made from the same or similar material as the flow tubes.
  • the ledges/brackets could be also of the same material as the coil material.
  • the disclosure provides a system for flowing process fluid through a flow tube for heat transfer in a chamber, comprising: a flow tube having an internal flow path to flow the process fluid; and a support tube configured to be coupled to the chamber and having an internal flow path to flow the process fluid, the internal flow path of the support tube being fluidicly coupled to the internal flow path of the flow tube and the support tube being mechanically coupled to the flow tube to support the flow tube.
  • the disclosure provides a method of flowing a process fluid through a flow tube and a support tube for heat transfer in a chamber, comprising: flowing the process fluid through an internal flow path of the support tube; flowing the process fluid through an internal flow path of a flow tube fluidicly coupled to the flow path of the support tube; and flowing the process fluid out of the internal flow path of the flow tube or the support tube.
  • Figure 1 is a cross-sectional side schematic view of a typical support system with brackets for supporting a coil within a differential temperature environment, such as a furnace.
  • Figure 2 is a cross-sectional side schematic view of a support system of the present disclosure with a support tube fluidicly coupled and mechanically coupled with a flow tube in a coil within a differential temperature environment, such as a furnace.
  • Figure 3 is a flow schematic of a process fluid through a plurality of support tubes fluidicly coupled to a flow tube in a coil.
  • Figure 4A is a schematic of a system having an inlet and an outlet with a plurality of support tubes that are coupled with a flow tube, the support tubes having a peripheral distribution.
  • Figure 4B is a schematic of another exemplary system having an inlet and an outlet with a plurality of support tubes that are coupled with a flow tube, the support tubes having a radial distribution.
  • Figure 4C is a schematic of another exemplary system having a plurality of inlets and outlets with a plurality of support tubes coupled with a plurality of flow tubes.
  • the present invention provides a system and method that allows use of the same or similar material as the flow tubes for the supports and without requiring more expensive stainless or higher alloy supports.
  • the disclosure provides one or more temperature moderated support tubes that allow the process fluid in the flow tubes to also pass through the support tubes.
  • the benefit is that the process fluid moderates the temperature of the support tubes and hence the thermal expansion of the support tubes to be relatively consistent with the expansion of the flow tubes of the coil, and further benefits from additional heat transfer area using the support tubes.
  • the support tubes can be made from the same or similar material as the flow tubes.
  • the ledges/brackets could be also of the same material as the coil material.
  • Figure 2 is a cross-sectional side schematic view of a support system of the present disclosure with a support tube fluidicly coupled and mechanically coupled with a flow tube in a coil within a differential temperature environment, such as a furnace.
  • the system 2 includes at least one flow tube 26 with one or more coils 28.
  • the system 2 can be mounted within a chamber 24, such as a furnace, having a top 36 and a bottom 38.
  • the flow tube 26 includes an internal flow path 27 through which process fluid can flow.
  • the flow tube generally extends through the chamber, such as through the top 36, to connect to other equipment not shown.
  • a support tube 30 can be coupled to the chamber 24, such as suspended from the top 36.
  • the support tube 30 can be oriented in a variety of positions, vertically, horizontally, or angularly, and the above example is non-limiting.
  • the support tube 30 includes an internal flow path 31 through which process fluid can flow.
  • the support tube 30 is generally fluidicly and mechanically coupled with the flow tube 26.
  • the support tube 30 is fluidicly coupled with the flow tube by coupling the flow path 31 of the support tube with the flow path 27 of the flow tube 26.
  • the process fluid can flow through both the flow tube 26 and the support tube 30.
  • the process fluid can flow into an inlet 32 through the flow path 31 of the support tube 30 and out of the flow path 27 of the flow tube 26 at an outlet 34.
  • This flow direction provides that the support tube will have the cooler process fluid prior to the process fluid entering the flow tube and becoming heated from the heat in the chamber 24. However, the flow direction can be reversed to flow through the flow tube and then through the support tube.
  • the support tube 30 is also mechanically coupled with the flow tube 26 to support the structure of the flow tube.
  • one or more brackets 40 can extend between the support tube 30 and the coils 28 of the flow tube 26.
  • Other mechanical coupling elements and means can be used, including fastening, welding, adhesively attaching, and other forms of attachment with or without separate elements and directly or indirectly between the support tube 30 and the flow tube 26.
  • the disclosure thus provides a flow-through support tube that can be cooled (in a heated chamber) with the same process fluid as flows through a flow tube.
  • the coupling of the flow paths of the support tube and the flow tube ensures that the process fluid will flow through the support tube whenever the process fluid flows through the flow tube.
  • the process fluid flowing through both the flow tube and the support tube can reduce a temperature gradient between the support tube and the flow tube that would otherwise exist without the cooling of supports. Less temperature gradients cause less thermal expansion and less stress on the system.
  • the cooling of the support tube allows the support tube to be made of similar material as the flow tube and can avoid more expensive alloy materials that otherwise would be used for typical high heat resistance without the cooling.
  • the same or similar material of the flow tube as the support tube can lead to the same or similar coefficient of expansion to further reduce stress from thermal expansion between the support tube and the flow tube.
  • the support tubes provide additional heat transfer area and can help efficiently transfer heat.
  • the support tubes 30A-30D are coupled to a header 46, which, in this exemplary flow direction, converges the process fluid from the support tubes into a common flow path.
  • the flow can be directed into the flow tube 26 through the coils 28 and out through the outlet 34.
  • the flow direction could be reversed, so that the flow is through the flow tube 26 initially, and then the header 46, through the support tubes 30A-30D, into the header 44, and out of the support tube 30.
  • Figures 4A-4C illustrate various arrangements of support tubes around a periphery of one or more flow tubes with various arrangements of headers.
  • the examples are non-limiting and only illustrate some of the options and arrangements possible given the underlying principles disclosed herein.
  • Other flow embodiments can be used, including: reversed flow directions (inlets effectively become outlets and so forth), combinations of radial and peripheral distribution and convergence of flows can be used, and combinations of sets of flow tubes with sets of support tubes that have separate flows from other sets of flow tubes and support tubes are possible and are contemplated in this disclosure.
  • Figure 4A is a schematic of a system having an inlet and an outlet with a plurality of support tubes that are coupled with a flow tube, the support tubes having a peripheral distribution.
  • a support tube 30 with an inlet 32 is coupled to a header 44 having header portions 44A, 44C with internal flow paths that are coupled to a header peripheral portion 44E also with an internal flow path.
  • the peripheral portion 44E is coupled to a plurality of support tubes 30A, 30B, 30C, 30D and can supply process fluid peripherally to the support tubes, especially to support tubes 30B, 30D that are peripherally distal from the support tubes 30A, 30C and the header portions 44A, 44C.
  • the support tubes 30A-30D are coupled to another header 46, distal from the header 44.
  • the header 46 includes header portions 46A-46D and a header peripheral portion 46E coupled to the header portions 46A-46D.
  • the header portions 46A-46D are coupled to a connection 48 that is coupled to the flow tube 26.
  • the flow tube 26 has an outlet 34 distal from the connection 48.
  • the support tubes 30A-30D can be coupled with the flow tube 26 for support thereof.
  • the process fluid can enter the inlet 32 of the support tube 30, flow through the header 44 to distribute the flow into the support tubes 30A-30D.
  • the process fluid can flow through the support tubes 30A-30D into the header 46, through the connection 48 into the flow tube 26 and associated coils 28, and through the outlet 34.
  • the flow directly can be reversed with the same underlying principles described herein.
  • FIG. 4B is a schematic of another exemplary system having an inlet and an outlet with a plurality of support tubes that are coupled with a flow tube.
  • a support tube 30 with an inlet 32 is coupled to a header 44 having header portions 44A, 44B, 44C that are coupled to a header peripheral portion 44E.
  • the header portions 44A, 44B, 44C can be radially coupled to a plurality of support tubes 30A, 30B, 30C (optionally independently of the header peripheral portion 44E) and can supply process fluid radially to the support tubes.
  • the support tubes 30A-30C can be coupled to another header 46, distal from the header 44.
  • the header 46 includes header portions 46A, 46B, 46C and a header peripheral portion 46E coupled to the header portions 46A-46C.
  • the header portions 46A-46C are coupled to a connection 48 that is coupled to the flow tube 26.
  • the flow tube 26 has an outlet 34 distal from the connection 48.
  • the support tubes 30A-30C can be coupled with the
  • the process fluid can enter the inlet 32 of the support tube 30, flow through the header 44 to distribute the flow into the support tubes 30A-30C.
  • the process fluid can flow downwardly through the support tubes 30A-30C into the header 46, through the connection 48 into the flow tube 26 and associated coils 28, and through the outlet 34.
  • the flow directly can be reversed with the same underlying principles described herein.
  • the peripheral portion 44E need not have an internal flow path that is coupled to the header portions 44A-44C.
  • the peripheral portion 44E can be only for support without any flow therethrough and can be a solid member.
  • Figure 4C is a schematic of another exemplary system having a plurality of inlets and outlets with a plurality of support tubes coupled with a plurality of flow tubes.
  • This embodiment has similar principles as described in other embodiments, but has a plurality of flow tubes 26A, 26B, 26C fluidicly coupled with a plurality of support tubes 30A, 30B, 30C, respectively.
  • One or more flow paths from one or more support tubes 30A- 30C can be fluidicly coupled with one or more flow paths through one or more flow tubes 26A-26C, so that a combined flow path of a support tube and a flow tube can independently flow the process fluid without being combined with flow paths of other flow tubes and support tubes.
  • the support tubes 30A-30C can each have an inlet 32A- 32C, respectively, and the flow tubes 26A-26C can each have an outlet 34A- 34C, respectively.
  • the support tubes can be coupled with the flow tubes to support the flow tubes.
  • one or more support rings 50, 52 at distal portions of the assembly of support tubes and flow tubes can further support the assembly in a direction radial to an axis of the assembly.
  • the support rings may or may not have flow paths.
  • FIG. 4C An alternative embodiment of Figure 4C is that the process fluids from the inlets 32A-32C could be combined through a flow path in the support ring 50, effectively acting as a header, and then flow through the support tubes 30A- 30C, and directly into the respective flow tubes 26A-26C. Further, the support ring 52 would also act as a header for combined flows of the support tubes 30A-30C. [0040] Other and further embodiments utilizing one or more aspects of the inventions described above can be devised without departing from the spirit of Applicant's invention. The embodiments of the system and method for flowing process fluid through one or more support tubes and through one or more flow tubes can be varied.
  • Coupled means any method or device for securing, binding, bonding, fastening, attaching, joining, inserting therein, forming thereon or therein, communicating, or otherwise associating, for example, mechanically, magnetically, electrically, chemically, fluidicly, directly or indirectly with intermediate elements, one or more pieces of members together and may further include without limitation integrally forming one functional member with another in a unity fashion.
  • the coupling may occur in any direction, including rotationally.
  • the order of steps can occur in a variety of sequences unless otherwise specifically limited.
  • the various steps described herein can be combined with other steps, interlineated with the stated steps, and/or split into multiple steps.
  • elements have been described functionally and can be embodied as separate components or can be combined into components having multiple functions.

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  • 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)

Abstract

La présente invention concerne un système et un procédé qui permettent l'utilisation, pour les supports, d'un matériau identique ou similaire à celui des tubes d'écoulement sans que des supports en alliage supérieur ou en acier inoxydable chers ne soient nécessaires. Le système de l'invention comprend un ou plusieurs tubes de support à modération de température, qui permettent au fluide de traitement circulant dans les tubes d'écoulement de passer également dans les tubes de support. L'avantage en est que le fluide de traitement modère la température des tubes de support et, par conséquent, la dilatation thermique des tubes de support est relativement en rapport avec l'expansion des tubes d'écoulement du serpentin, et qu'une zone de transfert de chaleur supplémentaire est fournie grâce aux tubes de support. Ainsi, les tubes de support peuvent être réalisés dans le même matériau que celui des tubes d'écoulement. Les pièces d'appui/attaches peuvent également être faites du même matériau que celui du serpentin.
PCT/US2013/035653 2012-04-16 2013-04-08 Supports à modération de température pour tubes d'écoulement WO2013158399A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/447,725 2012-04-16
US13/447,725 US20130269919A1 (en) 2012-04-16 2012-04-16 Temperature moderated supports for flow tubes

Publications (1)

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WO2013158399A1 true WO2013158399A1 (fr) 2013-10-24

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WO (1) WO2013158399A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265044A (en) * 1964-04-03 1966-08-09 Combustion Eng Heat exchanger tube support
DE3714596A1 (de) * 1986-05-03 1987-11-05 Vaillant Joh Gmbh & Co Rohrschlange, insbesondere fuer waermetauscher sowie behaelter mit einer solchen rohrschlange
EP0276791A1 (fr) * 1987-01-28 1988-08-03 STEIN INDUSTRIE Société Anonyme dite: Dispositif de solidarisation des boucles d'un élément d'échangeur de chaleur constitué par des tubes dans lesquels circule un fluide
FR2622963A1 (fr) * 1987-11-10 1989-05-12 Stein Industrie Dispositif de suspension dans un plan vertical d'un panneau de tubes horizontaux d'echange de chaleur en epingle a cheveux
WO1998028582A1 (fr) * 1996-12-23 1998-07-02 Combustion Engineering, Inc. Bride de fixation de tubulures a des tubes suspendus
US6736191B1 (en) * 2001-10-09 2004-05-18 Power Engineering Contractors, Inc. Heat exchanger having longitudinal structure and mounting for placement in seawater under piers for heating and cooling of buildings

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US2805048A (en) * 1954-01-12 1957-09-03 Henry W Angelery Coil structure for heat exchanger
FR1194319A (fr) * 1958-04-09 1959-11-09
US3306352A (en) * 1965-02-10 1967-02-28 Curren John Leo Compact coiled tube heat exchanger
US3378064A (en) * 1966-05-12 1968-04-16 Selas Corp Of America Tube support
US4287724A (en) * 1979-12-17 1981-09-08 Morehouse Industries, Inc. Air chiller/drier
US4421070A (en) * 1982-06-25 1983-12-20 Combustion Engineering, Inc. Steam cooled hanger tube for horizontal superheaters and reheaters
US5423378A (en) * 1994-03-07 1995-06-13 Dunham-Bush Heat exchanger element and heat exchanger using same
JP2835286B2 (ja) * 1994-08-11 1998-12-14 昇 丸山 熱交換コイル組立体及びその複合体
DE69432529T2 (de) * 1994-12-14 2004-02-26 Nomura, Shuzo, Yokohama Wärmetauscher
TW445366B (en) * 1998-05-15 2001-07-11 Noboru Maruyama Assembly body of heat exchange coils
US6321691B1 (en) * 1999-01-14 2001-11-27 The Babcock & Wilcox Company Oxidation resistant low alloy attachments for boiler components
DE102005021610A1 (de) * 2005-05-10 2006-11-23 BSH Bosch und Siemens Hausgeräte GmbH Wärmetauscher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265044A (en) * 1964-04-03 1966-08-09 Combustion Eng Heat exchanger tube support
DE3714596A1 (de) * 1986-05-03 1987-11-05 Vaillant Joh Gmbh & Co Rohrschlange, insbesondere fuer waermetauscher sowie behaelter mit einer solchen rohrschlange
EP0276791A1 (fr) * 1987-01-28 1988-08-03 STEIN INDUSTRIE Société Anonyme dite: Dispositif de solidarisation des boucles d'un élément d'échangeur de chaleur constitué par des tubes dans lesquels circule un fluide
FR2622963A1 (fr) * 1987-11-10 1989-05-12 Stein Industrie Dispositif de suspension dans un plan vertical d'un panneau de tubes horizontaux d'echange de chaleur en epingle a cheveux
WO1998028582A1 (fr) * 1996-12-23 1998-07-02 Combustion Engineering, Inc. Bride de fixation de tubulures a des tubes suspendus
US6736191B1 (en) * 2001-10-09 2004-05-18 Power Engineering Contractors, Inc. Heat exchanger having longitudinal structure and mounting for placement in seawater under piers for heating and cooling of buildings

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