US3696862A - Industrial furnace - Google Patents

Industrial furnace Download PDF

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Publication number
US3696862A
US3696862A US119243A US3696862DA US3696862A US 3696862 A US3696862 A US 3696862A US 119243 A US119243 A US 119243A US 3696862D A US3696862D A US 3696862DA US 3696862 A US3696862 A US 3696862A
Authority
US
United States
Prior art keywords
furnace
wall
heating
heating tube
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.)
Expired - Lifetime
Application number
US119243A
Other languages
English (en)
Inventor
Jan Van Dijk
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.)
Shell USA Inc
Original Assignee
Shell Oil Co
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 Shell Oil Co filed Critical Shell Oil Co
Application granted granted Critical
Publication of US3696862A publication Critical patent/US3696862A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
    • 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
    • C10G9/20—Tube furnaces
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure

Definitions

  • the invention relates to an industrial furnace for heating liquid or gaseous media in heating tubes which are arranged in rows in the heating space and at least some of which tubes run through openings in the furnace wall and issue outside the heating space.
  • the invention relates in particular to furnaces as used in the processing of petroleum products, such as for keeping intermediary or final products to a specific temperature, or for heating or reheating intermediate products to the conversion temperature.
  • Furnaces of the above-mentioned type are described, for example, in U.S. Pat. Nos. 2,592,608 and 3,181,508. These known furnaces are so designed that their horizontal cross-section has a rectangular shape. In principle, the present invention may also be applied to furnaces having a horizontal cross-section of circular shape, as described for example in U.K. Pat. No. 841,650.
  • the openings in the furnace wall to provide passage for heating tubes are each provided with a length of pipe, one end of which is rigidly secured to the fire hearth wall and the other end of which is provided with an outward-facing flange.
  • This outward-facing flange cooperates with a split second flange, the inside diameter of which is substantially equal to the diameter of the heating tube.
  • the split second flange supports the heating tube by way of an annular collar externally-welded to the heating tube, which collar sealingly rests on the split flange.
  • a second annular collar is also provided on the heating tube in the opening arranged in the wall of the fire hearth.
  • An additional advantage is that repairs are possible without the necessity of having to pull the heating tubes out of the furnace. Repairs can, in fact, be efiected from inside the furnace by pulling the heating tubes into the furnace hearth. This would not be possible in most conventional furnaces of this type.
  • FIG. 1 is a vertical sectional view ofa detail of a furnace, while FIG. 2 represents a top plan view of it.
  • l designates the furnace wall, viz. part of the roofing, which wall is provided with refractory lining 2 on the fire hearth side.
  • a heating tube 3 is passed outside die furnace through opening 4.
  • a length of pipe 5, having an inside diameter equal to the opening, is rigidly secured to the fire hearth wall.
  • the length of pipe is provided at one end with flange 6 which extends outwards.
  • a split flange (7a, 7b) cooperates with flange 6; the split flange has an inside diameter which is substantially equal to the diameter of the heating tube 3.
  • Adjusting cams l0 cooperate with the split flange and support annular collar 8 which is welded on the heating tube 3.
  • a second collar (collar 9), which is also welded to the heating tube, is positioned in opening 4.
  • packing 11 The space between the inner-most collar and the split flange is filled with packing 11.
  • This packing may consist of any suitable material, such as refractory material like that of the lining.
  • the packing consists of renewable heat-resisting material, such as asbestos, rockwool," or the like.
  • the adjusting cams serve to keep the distance between outer collar 8 and the upper side of flange 6 large enough to allow the packing to be inserted. Only after this is done is the split flange fitted by lifting the heating tube slightly.
  • the construction according to the invention is not only simple, but also facilitates maintenance of the furnace. For example, if it is necessary to work in the fire hearth space behind the heating tubes (e.g., when repairing the lining or carrying out welding work on the bundles of tubes or on the furnace wall), the heating tubes may be pulled aside, viz. into the fire hearth space.
  • channels of the series of tubes are normally arranged in panels of which the wall of the tire hearth space is composed. These panels are detachable and can be removed in their entirety together with the series of tubes. A detachable panel of this type can also be used as a hoisting girder.
  • heating tube 3 as shown in the drawing would not be supported by collar 8 resting on the flange 7a, lb, (or the adjusting earns 10), but would be directly supported by the tube itself resting on the flange 7a or 7b.
  • an improved support for said heating tubes which comprises:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Joints Allowing Movement (AREA)
  • Tunnel Furnaces (AREA)
US119243A 1970-03-05 1971-02-26 Industrial furnace Expired - Lifetime US3696862A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7003126.A NL160652C (nl) 1970-03-05 1970-03-05 Industrieoven voor het verhitten van vloeibare of gasvor- mige media.

Publications (1)

Publication Number Publication Date
US3696862A true US3696862A (en) 1972-10-10

Family

ID=19809501

Family Applications (1)

Application Number Title Priority Date Filing Date
US119243A Expired - Lifetime US3696862A (en) 1970-03-05 1971-02-26 Industrial furnace

Country Status (6)

Country Link
US (1) US3696862A (nl)
JP (1) JPS5338462B1 (nl)
DE (1) DE2110197A1 (nl)
FR (1) FR2084120A5 (nl)
GB (1) GB1303387A (nl)
NL (1) NL160652C (nl)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172312A (en) * 1975-09-08 1979-10-30 British Steel Corporation Method of making expandable seal for use between a recuperator tube and recuperator
US4315486A (en) * 1980-07-30 1982-02-16 Selas Corporation Of America Floating radiant tube sheets for vertical tube reformers and the like
US4319631A (en) * 1978-11-30 1982-03-16 Adolf Margraf Cooler for hot smoke-laden gases
US4444157A (en) * 1982-12-10 1984-04-24 Exxon Research And Engineering Co. Liquid cooled tube supports
US4449575A (en) * 1980-03-28 1984-05-22 Laws William R Fluidized bed heating apparatus
US4538338A (en) * 1983-05-02 1985-09-03 Snyder General Corporation Method for manufacturing a furnace heat exchanger and plate assembly
US4547943A (en) * 1980-08-15 1985-10-22 Snyder General Corporation Method of manufacturing a heat exchanger and plate assembly
US4649894A (en) * 1981-12-11 1987-03-17 Snydergeneral Corporation Heat exchanger and plate assembly and method of manufacture
US4665601A (en) * 1983-07-06 1987-05-19 Stein Industrie Method of assembly of ferritic stainless steel tubes to a carbon steel tube-plate
US4735259A (en) * 1984-02-21 1988-04-05 Hewlett-Packard Company Heated transfer line for capillary tubing
US5575330A (en) * 1993-01-22 1996-11-19 Alco Industries, Inc. Furnace heat exchanger seal and method of making same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541165A (en) * 1923-07-23 1925-06-09 Minache Sima Building material and process for manufacturing same
US2487626A (en) * 1945-04-21 1949-11-08 Richard C Wittman Sectional heater
US3259112A (en) * 1964-09-02 1966-07-05 Foster Wheeler Corp Removable tube support
US3496629A (en) * 1968-03-18 1970-02-24 Combustion Eng Method for securing tubes to a tube sheet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541165A (en) * 1923-07-23 1925-06-09 Minache Sima Building material and process for manufacturing same
US2487626A (en) * 1945-04-21 1949-11-08 Richard C Wittman Sectional heater
US3259112A (en) * 1964-09-02 1966-07-05 Foster Wheeler Corp Removable tube support
US3496629A (en) * 1968-03-18 1970-02-24 Combustion Eng Method for securing tubes to a tube sheet

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172312A (en) * 1975-09-08 1979-10-30 British Steel Corporation Method of making expandable seal for use between a recuperator tube and recuperator
US4319631A (en) * 1978-11-30 1982-03-16 Adolf Margraf Cooler for hot smoke-laden gases
US4449575A (en) * 1980-03-28 1984-05-22 Laws William R Fluidized bed heating apparatus
US4315486A (en) * 1980-07-30 1982-02-16 Selas Corporation Of America Floating radiant tube sheets for vertical tube reformers and the like
US4547943A (en) * 1980-08-15 1985-10-22 Snyder General Corporation Method of manufacturing a heat exchanger and plate assembly
US4649894A (en) * 1981-12-11 1987-03-17 Snydergeneral Corporation Heat exchanger and plate assembly and method of manufacture
US4444157A (en) * 1982-12-10 1984-04-24 Exxon Research And Engineering Co. Liquid cooled tube supports
US4538338A (en) * 1983-05-02 1985-09-03 Snyder General Corporation Method for manufacturing a furnace heat exchanger and plate assembly
US4665601A (en) * 1983-07-06 1987-05-19 Stein Industrie Method of assembly of ferritic stainless steel tubes to a carbon steel tube-plate
US4735259A (en) * 1984-02-21 1988-04-05 Hewlett-Packard Company Heated transfer line for capillary tubing
US5575330A (en) * 1993-01-22 1996-11-19 Alco Industries, Inc. Furnace heat exchanger seal and method of making same

Also Published As

Publication number Publication date
JPS5338462B1 (nl) 1978-10-16
GB1303387A (nl) 1973-01-17
NL7003126A (nl) 1971-09-07
NL160652C (nl) 1979-11-15
FR2084120A5 (nl) 1971-12-17
NL160652B (nl) 1979-06-15
DE2110197A1 (de) 1971-09-16

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