EP0044476A2 - Tube pour le chauffage indirect de matières facilement ruisselantes et échangeur de chaleur composé de tels tubes - Google Patents

Tube pour le chauffage indirect de matières facilement ruisselantes et échangeur de chaleur composé de tels tubes Download PDF

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Publication number
EP0044476A2
EP0044476A2 EP81105348A EP81105348A EP0044476A2 EP 0044476 A2 EP0044476 A2 EP 0044476A2 EP 81105348 A EP81105348 A EP 81105348A EP 81105348 A EP81105348 A EP 81105348A EP 0044476 A2 EP0044476 A2 EP 0044476A2
Authority
EP
European Patent Office
Prior art keywords
tube
tubes
pipe
heat exchanger
section
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
EP81105348A
Other languages
German (de)
English (en)
Other versions
EP0044476B1 (fr
EP0044476A3 (en
Inventor
Wolfgang Keller
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.)
Keller Wolfgang
Original Assignee
Individual
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Filing date
Publication date
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Publication of EP0044476A2 publication Critical patent/EP0044476A2/fr
Publication of EP0044476A3 publication Critical patent/EP0044476A3/de
Application granted granted Critical
Publication of EP0044476B1 publication Critical patent/EP0044476B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/22—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0404—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis with internal subdivision of the drum, e.g. for subdividing or recycling the material to be dried
    • F26B11/0418—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis with internal subdivision of the drum, e.g. for subdividing or recycling the material to be dried the subdivision consisting of a plurality of parallel tubes, e.g. through which the material to be dried is conveyed in single or multi-pass fashion
    • F26B11/0422—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis with internal subdivision of the drum, e.g. for subdividing or recycling the material to be dried the subdivision consisting of a plurality of parallel tubes, e.g. through which the material to be dried is conveyed in single or multi-pass fashion the tubes having internal members
    • 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
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • F28D11/04—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller performed by a tube or a bundle of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular

Definitions

  • the invention relates to a tube for indirect heat treatment of powdery to granular, free-flowing material which is parallel to the tube,. Rotatable about an axis that can be inside or outside the tube, and a heat exchanger that is constructed from such tubes and components for manufacturing the tube bundle for such a heat exchanger.
  • the rotary kiln can be divided into parallel chambers to increase the surface.
  • a continuous process is preferred; therefore are in known rotary kilns Conveying elements available for the product to be treated; Usually, these are the helix in the (cylindrical) tube on the inside. It is known that it is very important that the material to be treated is thoroughly mixed in the tube in order to achieve uniform treatment and good heat transfer and to avoid damage to the material. Therefore, in known heat exchangers to improve the mixing effect, in addition to the helical conveying elements, baffles or rods or other baffles are also provided parallel to the tube jacket, as a result of which better mixing is achieved when the tube is turned.
  • a tube or a heat exchanger which consists of a plurality of tubes connected in parallel has advantageous properties if the tube jacket is composed of flat surfaces and baffles are present at least on an inner tube jacket surface at an angle to the tube axis.
  • the invention therefore relates to a tube for indirect heat treatment of powdery to granular, free-flowing material which runs parallel to the tube about an axis which can be inside or outside the tube, is rotatable and the tubular jacket is composed of flat surfaces and baffles are provided at least on an inner tubular jacket surface at an angle to the pipe axis. Pipes whose cross sections are square or equilateral triangular are very particularly preferred.
  • a heat exchanger constructed from the tubes according to the invention is particularly suitable for heat exchange with another solid medium if equilateral triangles or squares are interconnected in the densest packing, which are flowed through in such a way that two tubes through which the same medium flows do not abut one side.
  • a line-shaped arrangement of the tubes according to the invention can be useful. The distance between two such tube surface bundles can be chosen freely according to the heat transfer conditions.
  • the invention is also directed to the internals for the heat exchanger, by means of which the tube bundles with flat tube jacket surfaces can be produced in a simple manner. They are formed from sheets that are folded in such a way that by connecting two identical or different sheets on their two outer sides, a row of tubes with flat tube jacket surfaces is created.
  • the pipe according to the invention with flat surfaces has several advantages over the known cylindrical pipe, which are particularly useful when several such pipes are connected in parallel. With the same cross-section, the heat exchange surface is larger. With less effort than with cylindrical pipes, the conveying and mixing performance can be improved by simple installations. While with a circular tube for manufacturing reasons, a spiral running around the entire inner wall is practically always required and to increase the mixing effect, baffles on the wall are required, with a triangular or quadrangular pipe, it is sufficient if sheets are attached to a pipe inner wall at an angle to the axis. The dwell time spectrum is not significantly broadened by omitting conveyor elements on some inner sides. Because of the conveying elements, the rotary kiln according to the invention is generally operated horizontally.
  • Solid material can also flow through it in cocurrent or countercurrent without difficulty.
  • it is considerably less complex if rectangular guide plates only have to be attached to a flat inner wall than if a continuous helix has to be attached to the inner tube.
  • Such tubes can also be produced with a very small cross section without difficulty.
  • the heat exchange surface can thereby be considerably increased for a given cross section of the furnace; in addition, the mixing compared to round pipes is increased.
  • the edges where the flat outer surfaces meet look like chicanes. It has been shown that rods or other baffles can usually be dispensed with in the tubes according to the invention. Despite the unusual tube shape, a reactor can be produced more economically from the tubes according to the invention than with round tubes of the same output.
  • heat exchanger there are no problems with the dimensioning of the heat exchanger; however, some conditions for optimal heat transfer are particularly good customizable.
  • a heat exchanger can be adapted particularly well both for indirect heat exchange with a gas or a liquid or with another solid substance.
  • the triangular and rectangular cross section of the tubes is preferred.
  • the obvious hexagonal honeycomb arrangement in a heat exchanger is less suitable. Even pipes with a side length of a few centimeters can be realized.
  • the shape of the tubes according to the invention allows a particularly simple manufacture of the heat exchanger inserts.
  • a tube 1 according to the invention is shown schematically with a square cross section.
  • the pipe is horizontal, it is sufficient to transport the solid if rectangular conveyor ribs 2 are welded onto an inside.
  • baffles parallel to the pipe axis can normally be dispensed with.
  • a square tube 1 with conveyor 2 and baffle ribs 3 is shown in cross and longitudinal section.
  • FIG. 4 shows a triangular tube 4 with conveying ribs 5 and retaining ribs 6.
  • the length of the flat surfaces in cross section is particularly preferably 80 to 200 mm.
  • the tubes according to the invention are connected in parallel in order to enlarge the heat exchange surface.
  • a longitudinal section through such a heat exchanger is shown in Fig. 5.
  • the interconnected pipes 10 are normally surrounded by a cylindrical sleeve 11.
  • the reactor is operated horizontally.
  • a heat exchange is to take place between two solid products.
  • the heat-emitting product is fed in via the hopper 12 and passes through the reactor from left to right. A mirror image of this is on the on the right side (not shown here) there is an analog feeding device for the cold product; during the passage through the tubes 10 from right to left, it absorbs heat and exits the heat exchanger via the outlet opening 13.
  • the product feed device 14 effects a uniform metering.
  • the metering 14 always ensures that the fill level in the tubes 10 always remains constant over the entire length, and that all tubes which are flowed through by the same product are filled equally, if at all A correction of the quantity may be necessary for the outer tubes of the insert, since these tubes are not equally involved in heat transfer on all sides.
  • a section 7-7 through the heat exchanger in Fig. 5 with triangular tubes is shown in Fig. 6, with square tubes in Fig. 7.
  • the tubes 10a are flowed through in the opposite direction by the product to be heated, the tubes 10b by the product to be cooled.
  • the tubes 12 are combined like a band in this case; the solid medium is guided through them.
  • the heating or cooling gas or the liquid flows around them on all sides.
  • the densest packing was omitted here in order to reduce the flow velocity e.g. of the gas.
  • This structure is particularly preferred when the solid substance flowing through an insert according to FIG. 10 is to give off or absorb its heat to a liquid or a gas, for which of course no tubular guide is necessary.
  • a liquid medium the gap between two inserts according to FIG. 10 can be small. If it is in the second medium is a gas, it may be useful if g to the disk inserts by Fi. 10 outside fins are present to increase the heat exchange area.
  • these pipes can achieve heat transfer coefficients of over 100 Wm -2 K -1 based on the entire pipe area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal Sciences (AREA)
  • Microbiology (AREA)
  • Geometry (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP81105348A 1980-07-18 1981-07-09 Tube pour le chauffage indirect de matières facilement ruisselantes et échangeur de chaleur composé de tels tubes Expired EP0044476B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3027187 1980-07-18
DE19803027187 DE3027187A1 (de) 1980-07-18 1980-07-18 Rohr zur indirekten waermebehandlung von rieselfaehigen stoffen, aus solchen rohren zusammengesetzter waermeaustauscher und bauteile zur fertigung der rohrbuendel

Publications (3)

Publication Number Publication Date
EP0044476A2 true EP0044476A2 (fr) 1982-01-27
EP0044476A3 EP0044476A3 (en) 1982-09-22
EP0044476B1 EP0044476B1 (fr) 1985-05-22

Family

ID=6107476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105348A Expired EP0044476B1 (fr) 1980-07-18 1981-07-09 Tube pour le chauffage indirect de matières facilement ruisselantes et échangeur de chaleur composé de tels tubes

Country Status (3)

Country Link
EP (1) EP0044476B1 (fr)
DE (2) DE3027187A1 (fr)
ES (1) ES8206011A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370144A1 (fr) * 1987-09-03 1990-05-30 Kawasaki Jukogyo Kabushiki Kaisha Procédé de régulation de l'humidité du charbon
EP2348272A3 (fr) * 2010-01-22 2015-08-26 Technische Universität Darmstadt Echangeur thermique régénératif et procédé de transmission de chaleur entre deux matières solides
CN115388625A (zh) * 2022-08-30 2022-11-25 湖南越洋药业有限公司 一种应用于甲泼尼龙生产的反冲旋转式烘干设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115388624B (zh) * 2022-08-30 2023-06-13 湖南越洋药业有限公司 一种应用于甲泼尼龙生产的旋转可调式烘干设备

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR489266A (fr) * 1918-03-12 1919-01-11 Gio Ansaldo & Cie Faisceau tubulaire réfrigérant avec circulation d'un liquide à l'extérieur et d'un fluide à l'intérieur
GB252373A (en) * 1925-05-19 1927-04-14 Simmon Maschf Hans Process and apparatus for the exchange of heat between gaseous, vapour like or liquid bodies
US1769412A (en) * 1928-06-09 1930-07-01 Traylor Engineering & Mfg Co Rotary tube cooler
US2899176A (en) * 1959-08-11 Heat exchanger
US3602298A (en) * 1969-04-25 1971-08-31 Mecislaus Joseph Ciesielski Heat exchanger
DE1778226A1 (de) * 1968-04-09 1971-10-14 Ljungberg Bror Gustaf Rauch-oder Flammenrohr,insbesondere fuer Heizkessel
DE2109308A1 (de) * 1971-02-26 1972-09-07 Linde Ag Verfahren zur Herstellung eines Blechpaketes, insbesondere eines Platten Wärmetauschers
DE2946904B1 (de) * 1979-11-21 1981-02-26 Bayer Ag, 5090 Leverkusen Von außen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, ggf. angeschlämmtem Gut

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899176A (en) * 1959-08-11 Heat exchanger
FR489266A (fr) * 1918-03-12 1919-01-11 Gio Ansaldo & Cie Faisceau tubulaire réfrigérant avec circulation d'un liquide à l'extérieur et d'un fluide à l'intérieur
GB252373A (en) * 1925-05-19 1927-04-14 Simmon Maschf Hans Process and apparatus for the exchange of heat between gaseous, vapour like or liquid bodies
US1769412A (en) * 1928-06-09 1930-07-01 Traylor Engineering & Mfg Co Rotary tube cooler
DE1778226A1 (de) * 1968-04-09 1971-10-14 Ljungberg Bror Gustaf Rauch-oder Flammenrohr,insbesondere fuer Heizkessel
US3602298A (en) * 1969-04-25 1971-08-31 Mecislaus Joseph Ciesielski Heat exchanger
DE2109308A1 (de) * 1971-02-26 1972-09-07 Linde Ag Verfahren zur Herstellung eines Blechpaketes, insbesondere eines Platten Wärmetauschers
DE2946904B1 (de) * 1979-11-21 1981-02-26 Bayer Ag, 5090 Leverkusen Von außen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, ggf. angeschlämmtem Gut

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370144A1 (fr) * 1987-09-03 1990-05-30 Kawasaki Jukogyo Kabushiki Kaisha Procédé de régulation de l'humidité du charbon
EP2348272A3 (fr) * 2010-01-22 2015-08-26 Technische Universität Darmstadt Echangeur thermique régénératif et procédé de transmission de chaleur entre deux matières solides
CN115388625A (zh) * 2022-08-30 2022-11-25 湖南越洋药业有限公司 一种应用于甲泼尼龙生产的反冲旋转式烘干设备
CN115388625B (zh) * 2022-08-30 2023-06-13 湖南越洋药业有限公司 一种应用于甲泼尼龙生产的反冲旋转式烘干设备

Also Published As

Publication number Publication date
DE3170594D1 (en) 1985-06-27
ES504077A0 (es) 1982-06-16
EP0044476B1 (fr) 1985-05-22
EP0044476A3 (en) 1982-09-22
ES8206011A1 (es) 1982-06-16
DE3027187A1 (de) 1982-02-11

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