EP0029194A1 - Von aussen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, gegebenenfalls angeschlämmtem Gut - Google Patents

Von aussen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, gegebenenfalls angeschlämmtem Gut Download PDF

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Publication number
EP0029194A1
EP0029194A1 EP80106906A EP80106906A EP0029194A1 EP 0029194 A1 EP0029194 A1 EP 0029194A1 EP 80106906 A EP80106906 A EP 80106906A EP 80106906 A EP80106906 A EP 80106906A EP 0029194 A1 EP0029194 A1 EP 0029194A1
Authority
EP
European Patent Office
Prior art keywords
tube
granular
outside
heat treatment
cooled
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.)
Ceased
Application number
EP80106906A
Other languages
German (de)
English (en)
French (fr)
Inventor
Wolfgang Dipl.-Ing. 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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of EP0029194A1 publication Critical patent/EP0029194A1/de
Ceased 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
    • 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
    • F26B11/0445—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 having conductive heating arrangements, e.g. heated drum wall
    • 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
    • F26B11/0463—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 having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall
    • F26B11/0477—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 having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum

Definitions

  • the invention is directed to an externally heatable or coolable, rotatable heat exchanger tube for the heat treatment of powdery to granular, free-flowing, optionally slurried material, which has internals.
  • Such tubes are either individual tubes that can be rotated about their own axis or are arranged in parallel in a rotor rotating about a central axis.
  • the rotary tube or the rotor are surrounded by a housing which is covered by a heat exchange medium, e.g. tempered gas or liquid is flowed through.
  • the heat is exchanged between the temperature control medium and the material passing through the pipe via the pipe wall.
  • Heat transfer by radiation e.g. heating elements
  • cooling and heating drums the pipes of which have internals, such as lifting blades and / or screw spirals, are sufficiently known.
  • direct heating the material to be treated is in the pipes in the Co-current or counter-current conveyed with the heating medium with an inclined or horizontal drum.
  • the aim of these embodiments is to mix the heating gas and the material intimately in order to achieve the best possible heat transfer.
  • This type of direct heat transfer from the heating or cooling medium to the goods is simple and very effective. However, many goods must not come into contact with the heating medium.
  • the cleaning of the heating and cooling gases from entrained particles is very complex. Therefore, indirectly tempered cooling or heating drums are increasingly being used.
  • tube dryers for indirect heat treatment in which helices are built in for the uniform transport of the material.
  • strips are often attached to the inner wall, which are intended to prevent slipping, sliding or rolling on the drum wall. If one were to install the lifting blades or strips known from the directly heatable tubes in indirectly heated tubes, then this would be disadvantageous.
  • the dust discharge would increase considerably, so that filters would have to be used; undesirable recondensation would occur and the undesirable cross-mixing with the product separation in the case of different grain sizes could occur in the case of indirect heating.
  • direct heat treatment it can be disadvantageous when all particles experience a precisely defined, even transport, that there is good contact with the pipe wall and that there is little gas inclusion between the particles.
  • Indirect heat treatment strives for exactly the opposite effects.
  • the mechanisms of heat transfer in indirect heat treatment depend to a much greater extent on the properties of the material to be treated, the pipe dimensions and the layer heights than in direct heat transfer.
  • indirect heat transfer the measures for good heat transfer at low temperatures (transfer through contact) can also be different than at high temperatures (transfer through radiation).
  • each type of indirect heat transfer has the following requirements in common: As far as possible no sliding, rolling or sliding of the goods on the pipe wall, but a defined dwell time on the wall; Throwing or sliding of the goods conveyed up during the rotary movement directly above the surface of the goods, so that the dropped goods can slide down, slide or roll on the sloping surface formed.
  • the slope of the coils arranged in the pipes for transport should only be so steep that no union takes place.
  • the arrangement, shape and height of the strips (in extreme cases there may be bars against the wall), which should prevent the material from slipping on the inside of the pipe, are the decisive factors for good heat transfer in addition to the speed of the pipe and the spiral pitch. It is particularly advantageous to position the strips at such an angle that the strip is oriented approximately parallel to the surface of the material when the tube rotates when it slides out of the material.
  • the shape of the strips which is ideal for good heat transfer, is difficult to achieve, since the uniform transport of the goods is disturbed by these internals. In all solutions, however, the tube should only be filled with material to such an extent that the material does not flow over the spiral webs in order to avoid undesired cross-mixing.
  • the demands for the uniform transport of all particles, the adherence of the goods to the pipe wall, dropping of the highly conveyed goods directly above the surface of the goods and the avoidance of throws during the conveyance is achieved according to the invention in that the internals from near the Pipe inner wall arranged longitudinal strips and at least one coil coinciding with its axis with the pipe axis, the longitudinal strips together with the coil forming a structural unit which is attached to the pipe ends.
  • the structural units are preferably interchangeably attached to the pipe ends.
  • This embodiment is particularly favorable since the pipes are usually too narrow for a man to crawl in to fix the internals.
  • the design allows the internals for each tube to be pushed into or pulled out of the tube as a unit.
  • the attachment to the pipe ends is easily accessible.
  • This constructive design is not only advantageous for the initial assembly; it is also particularly economical when replacing worn-out installation units and, by replacing the entire installation set, allows installations which are particularly adapted to the goods to be treated to be used without great effort, in order to optimize the heat transfer during the successive treatment of different goods.
  • the tubes themselves are preferably on the outside with ribs, for. B. longitudinal or transverse ribs, or other area-enlarging elements to improve the heat transfer.
  • a rotary tube 2 is rotatably held in bearings 3 in a housing 1 and can be driven by means of a drive 4. Via a material feed pipe 5 and a chute 6, the feed is carried out on the front side 7 of the housing 1.
  • a hot gas supply nozzle 8 opens out into the interior of the housing 1 through the front side 7.
  • a unit 12 of internals which consists of longitudinal strips 13 and a helix 14, is arranged and fastened to the tube ends by means of screw connections 15.
  • the longitudinal strips 13 have such an inclination that when they emerge from the material they are parallel to the surface thereof. They are lower than the web height of the helix 14.
  • the helix 14 has such a slope that there is no throw during the conveyance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Treatment Of Sludge (AREA)
EP80106906A 1979-11-21 1980-11-08 Von aussen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, gegebenenfalls angeschlämmtem Gut Ceased EP0029194A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2946904A DE2946904C2 (de) 1979-11-21 1979-11-21 Von außen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, ggf. angeschlämmtem Gut
DE2946904 1979-11-21

Publications (1)

Publication Number Publication Date
EP0029194A1 true EP0029194A1 (de) 1981-05-27

Family

ID=6086520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106906A Ceased EP0029194A1 (de) 1979-11-21 1980-11-08 Von aussen beheiz- oder kühlbares, drehbares Wärmetauscherrohr zum Wärmebehandeln von pulvrigem bis körnigem, rieselfähigem, gegebenenfalls angeschlämmtem Gut

Country Status (5)

Country Link
EP (1) EP0029194A1 (es)
JP (1) JPS5685690A (es)
DE (1) DE2946904C2 (es)
ES (1) ES497004A0 (es)
ZA (1) ZA807219B (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3600549A1 (de) * 1986-01-10 1987-07-16 Krupp Polysius Ag Trommel zum waermeaustausch zwischen feststoff-gut und gas
CN104406437A (zh) * 2014-11-25 2015-03-11 上海安杰反光材料有限公司 玻璃微珠降温装置及其降温方法
CN106767055A (zh) * 2016-12-09 2017-05-31 上海泽玛克敏达机械设备有限公司 一种管式冷却设备
CN112802638A (zh) * 2020-12-30 2021-05-14 松田电工（台山）有限公司 一种扁平漆包线烘焙炉

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027187A1 (de) * 1980-07-18 1982-02-11 Bayer Ag, 5090 Leverkusen Rohr zur indirekten waermebehandlung von rieselfaehigen stoffen, aus solchen rohren zusammengesetzter waermeaustauscher und bauteile zur fertigung der rohrbuendel
DE3212965A1 (de) * 1982-04-07 1983-10-13 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von granulaten wasserunloeslicher feststoffe
FR2574069A1 (fr) * 1984-01-26 1986-06-06 David Jean Procede de mise en forme de la terre pour la realisation des murs et cloisons de batiments
CN103697732B (zh) * 2013-12-25 2015-10-28 南宁广发重工集团有限公司 一种多筒冷却机用冷却筒
CN111495738A (zh) * 2020-04-29 2020-08-07 薛晓辉 一种土壤修复用土壤颗粒筛分装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB259657A (en) * 1925-07-13 1926-10-13 Drake & Gorham Ltd Improvements in or relating to electric tea drying machines
GB613913A (en) * 1945-02-23 1948-12-07 John Ernest Laschinger Improvements in heat exchangers for continuous treatment of fluent material
GB907581A (en) * 1958-08-15 1962-10-10 Ici Ltd Improvements in and relating to rotary driers, coolers, mixers and the like
DE1629045A1 (de) * 1966-12-21 1971-01-14 Quarzwerke Gmbh Trockentrommel mit Trommeleinbauten
DE2307525A1 (de) * 1972-02-15 1973-08-30 Commw Scient Ind Res Org Verfahren und vorrichtung zur waermeuebertragung auf ein oder von einem material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245154A (en) * 1961-08-17 1966-04-12 Bojner Gustav Rotary driers
DE1257685B (de) * 1965-12-27 1967-12-28 Hoechst Ag Konvektionstrommeltrockner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB259657A (en) * 1925-07-13 1926-10-13 Drake & Gorham Ltd Improvements in or relating to electric tea drying machines
GB613913A (en) * 1945-02-23 1948-12-07 John Ernest Laschinger Improvements in heat exchangers for continuous treatment of fluent material
GB907581A (en) * 1958-08-15 1962-10-10 Ici Ltd Improvements in and relating to rotary driers, coolers, mixers and the like
DE1629045A1 (de) * 1966-12-21 1971-01-14 Quarzwerke Gmbh Trockentrommel mit Trommeleinbauten
DE2307525A1 (de) * 1972-02-15 1973-08-30 Commw Scient Ind Res Org Verfahren und vorrichtung zur waermeuebertragung auf ein oder von einem material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3600549A1 (de) * 1986-01-10 1987-07-16 Krupp Polysius Ag Trommel zum waermeaustausch zwischen feststoff-gut und gas
CN104406437A (zh) * 2014-11-25 2015-03-11 上海安杰反光材料有限公司 玻璃微珠降温装置及其降温方法
CN106767055A (zh) * 2016-12-09 2017-05-31 上海泽玛克敏达机械设备有限公司 一种管式冷却设备
CN112802638A (zh) * 2020-12-30 2021-05-14 松田电工（台山）有限公司 一种扁平漆包线烘焙炉
CN112802638B (zh) * 2020-12-30 2021-10-01 松田电工（台山）有限公司 一种扁平漆包线烘焙炉

Also Published As

Publication number Publication date
ES8107380A1 (es) 1981-10-01
JPS5685690A (en) 1981-07-11
ZA807219B (en) 1981-11-25
DE2946904B1 (de) 1981-02-26
DE2946904C2 (de) 1981-10-15
ES497004A0 (es) 1981-10-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19801108

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL

STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 19820407

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KELLER,WOLFGANG,DIPL.-ING.